31001130 has 40 divisors (see below), whose sum is σ = 83360772. Its totient is φ = 8266752.

The previous prime is 31001119. The next prime is 31001143. The reversal of 31001130 is 3110013.

It can be written as a sum of positive squares in 2 ways, for example, as 30239001 + 762129 = 5499^2 + 873^2 .

It is a super-2 number, since 2×31001130² = 1922140122553800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 18327 + ... + 19946.

Almost surely, 2^31001130 is an apocalyptic number.

31001130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31001130 is an abundant number, since it is smaller than the sum of its proper divisors (52359642).

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

31001130 is a wasteful number, since it uses less digits than its factorization.

31001130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38292 (or 38283 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 31001130 is about 5567.8658389009. The cubic root of 31001130 is about 314.1418821391.

Adding to 31001130 its reverse (3110013), we get a palindrome (34111143).

The spelling of 31001130 in words is "thirty-one million, one thousand, one hundred thirty".