31746051157 has 4 divisors (see below), whose sum is σ = 31747258080. Its totient is φ = 31744844236.

The previous prime is 31746051131. The next prime is 31746051173. The reversal of 31746051157 is 75115064713.

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 a de Polignac number, because none of the positive numbers 2^k-31746051157 is a prime.

It is a super-2 number, since 2×31746051157² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31746054157) 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, 563107 + ... + 616912.

It is an arithmetic number, because the mean of its divisors is an integer number (7936814520).

Almost surely, 2^31746051157 is an apocalyptic number.

It is an amenable number.

31746051157 is a deficient number, since it is larger than the sum of its proper divisors (1206923).

31746051157 is a wasteful number, since it uses less digits than its factorization.

31746051157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206922.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 31746051157 in words is "thirty-one billion, seven hundred forty-six million, fifty-one thousand, one hundred fifty-seven".