51670100 has 18 divisors (see below), whose sum is σ = 112124334. Its totient is φ = 20668000.

The previous prime is 51670097. The next prime is 51670103. The reversal of 51670100 is 107615.

It is an interprime number because it is at equal distance from previous prime (51670097) and next prime (51670103).

It can be written as a sum of positive squares in 3 ways, for example, as 13675204 + 37994896 = 3698^2 + 6164^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51670103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258251 + ... + 258450.

Almost surely, 2^51670100 is an apocalyptic number.

51670100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51670100 is an abundant number, since it is smaller than the sum of its proper divisors (60454234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51670100 is a wasteful number, since it uses less digits than its factorization.

51670100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516715 (or 516708 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51670100 is about 7188.1917058465. The cubic root of 51670100 is about 372.4601101377.

Adding to 51670100 its reverse (107615), we get a palindrome (51777715).

The spelling of 51670100 in words is "fifty-one million, six hundred seventy thousand, one hundred".