31045166157 has 4 divisors (see below), whose sum is σ = 41393554880. Its totient is φ = 20696777436.

The previous prime is 31045166153. The next prime is 31045166203. The reversal of 31045166157 is 75166154013.

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 not a de Polignac number, because 31045166157 - 2² = 31045166153 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 (31045166153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174194357 + ... + 5174194362.

It is an arithmetic number, because the mean of its divisors is an integer number (10348388720).

Almost surely, 2^31045166157 is an apocalyptic number.

It is an amenable number.

31045166157 is a deficient number, since it is larger than the sum of its proper divisors (10348388723).

31045166157 is a wasteful number, since it uses less digits than its factorization.

31045166157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348388722.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 31045166157 in words is "thirty-one billion, forty-five million, one hundred sixty-six thousand, one hundred fifty-seven".