31002072 has 32 divisors (see below), whose sum is σ = 81585600. Its totient is φ = 9789984.

The previous prime is 31002061. The next prime is 31002089. The reversal of 31002072 is 27020013.

It is a super-2 number, since 2×31002072² = 1922256936586368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33538 + ... + 34449.

It is an arithmetic number, because the mean of its divisors is an integer number (2549550).

Almost surely, 2^31002072 is an apocalyptic number.

It is an amenable number.

31002072 is an abundant number, since it is smaller than the sum of its proper divisors (50583528).

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

31002072 is a wasteful number, since it uses less digits than its factorization.

31002072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68015 (or 68011 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 31002072 is about 5567.9504308138. The cubic root of 31002072 is about 314.1450639442.

Adding to 31002072 its reverse (27020013), we get a palindrome (58022085).

The spelling of 31002072 in words is "thirty-one million, two thousand, seventy-two".