51532644 has 24 divisors (see below), whose sum is σ = 127316448. Its totient is φ = 16167040.

The previous prime is 51532643. The next prime is 51532669. The reversal of 51532644 is 44623515.

It is a super-2 number, since 2×51532644² = 5311226795261472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51532643) 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 7 ways as a sum of consecutive naturals, for example, 126102 + ... + 126509.

It is an arithmetic number, because the mean of its divisors is an integer number (5304852).

Almost surely, 2^51532644 is an apocalyptic number.

It is an amenable number.

51532644 is an abundant number, since it is smaller than the sum of its proper divisors (75783804).

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

51532644 is a wasteful number, since it uses less digits than its factorization.

51532644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252635 (or 252633 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 51532644 is about 7178.6241021522. The cubic root of 51532644 is about 372.1295363426.

The spelling of 51532644 in words is "fifty-one million, five hundred thirty-two thousand, six hundred forty-four".