31005272 has 16 divisors (see below), whose sum is σ = 58594560. Its totient is φ = 15380064.

The previous prime is 31005241. The next prime is 31005287. The reversal of 31005272 is 27250013.

It is a super-2 number, since 2×31005272² = 1922653783587968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14243 + ... + 16274.

It is an arithmetic number, because the mean of its divisors is an integer number (3662160).

Almost surely, 2^31005272 is an apocalyptic number.

It is an amenable number.

31005272 is a deficient number, since it is larger than the sum of its proper divisors (27589288).

31005272 is a wasteful number, since it uses less digits than its factorization.

31005272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30650 (or 30646 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 31005272 is about 5568.2377822791. The cubic root of 31005272 is about 314.1558721424.

Adding to 31005272 its reverse (27250013), we get a palindrome (58255285).

The spelling of 31005272 in words is "thirty-one million, five thousand, two hundred seventy-two".