31045137 has 4 divisors (see below), whose sum is σ = 41393520. Its totient is φ = 20696756.

The previous prime is 31045129. The next prime is 31045139. The reversal of 31045137 is 73154013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31045137 - 2³ = 31045129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31045139) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5174187 + ... + 5174192.

It is an arithmetic number, because the mean of its divisors is an integer number (10348380).

Almost surely, 2^31045137 is an apocalyptic number.

It is an amenable number.

31045137 is a deficient number, since it is larger than the sum of its proper divisors (10348383).

31045137 is a wasteful number, since it uses less digits than its factorization.

31045137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348382.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 31045137 is about 5571.8163106836. The cubic root of 31045137 is about 314.2904563531.

The spelling of 31045137 in words is "thirty-one million, forty-five thousand, one hundred thirty-seven".