157160681 has 4 divisors (see below), whose sum is σ = 157199952. Its totient is φ = 157121412.

The previous prime is 157160677. The next prime is 157160687. The reversal of 157160681 is 186061751.

157160681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 186061751 = 59 ⋅3153589.

It is a cyclic number.

It is not a de Polignac number, because 157160681 - 2² = 157160677 is a prime.

It is a super-2 number, since 2×157160681² = 49398959304767522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157160687) 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, 12851 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (39299988).

Almost surely, 2^157160681 is an apocalyptic number.

It is an amenable number.

157160681 is a deficient number, since it is larger than the sum of its proper divisors (39271).

157160681 is an equidigital number, since it uses as much as digits as its factorization.

157160681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39270.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 157160681 is about 12536.3743163644. The cubic root of 157160681 is about 539.6530475911.

The spelling of 157160681 in words is "one hundred fifty-seven million, one hundred sixty thousand, six hundred eighty-one".