31374157 has 4 divisors (see below), whose sum is σ = 31842496. Its totient is φ = 30905820.

The previous prime is 31374151. The next prime is 31374169. The reversal of 31374157 is 75147313.

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 31374157 - 2⁷ = 31374029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31374151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234069 + ... + 234202.

It is an arithmetic number, because the mean of its divisors is an integer number (7960624).

Almost surely, 2^31374157 is an apocalyptic number.

It is an amenable number.

31374157 is a deficient number, since it is larger than the sum of its proper divisors (468339).

31374157 is an equidigital number, since it uses as much as digits as its factorization.

31374157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468338.

The product of its digits is 8820, while the sum is 31.

The square root of 31374157 is about 5601.2638752339. The cubic root of 31374157 is about 315.3968526331.

The spelling of 31374157 in words is "thirty-one million, three hundred seventy-four thousand, one hundred fifty-seven".