31241145 has 32 divisors (see below), whose sum is σ = 54238464. Its totient is φ = 15264000.

The previous prime is 31241113. The next prime is 31241159. The reversal of 31241145 is 54114213.

It is not a de Polignac number, because 31241145 - 2⁵ = 31241113 is a prime.

It is a super-2 number, since 2×31241145² = 1952018281822050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28915 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (1694952).

Almost surely, 2^31241145 is an apocalyptic number.

It is an amenable number.

31241145 is a deficient number, since it is larger than the sum of its proper divisors (22997319).

31241145 is a wasteful number, since it uses less digits than its factorization.

31241145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233.

The product of its digits is 480, while the sum is 21.

The square root of 31241145 is about 5589.3778723575. The cubic root of 31241145 is about 314.9505087275.

Adding to 31241145 its reverse (54114213), we get a palindrome (85355358).

The spelling of 31241145 in words is "thirty-one million, two hundred forty-one thousand, one hundred forty-five".