157361381 has 4 divisors (see below), whose sum is σ = 161020992. Its totient is φ = 153701772.

The previous prime is 157361371. The next prime is 157361383. The reversal of 157361381 is 183163751.

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: 183163751 = 271 ⋅675881.

It is a cyclic number.

It is not a de Polignac number, because 157361381 - 2⁶ = 157361317 is a prime.

It is a super-2 number, since 2×157361381² = 49525208460454322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157361383) 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, 1829741 + ... + 1829826.

It is an arithmetic number, because the mean of its divisors is an integer number (40255248).

Almost surely, 2^157361381 is an apocalyptic number.

It is an amenable number.

157361381 is a deficient number, since it is larger than the sum of its proper divisors (3659611).

157361381 is an equidigital number, since it uses as much as digits as its factorization.

157361381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659610.

The product of its digits is 15120, while the sum is 35.

The square root of 157361381 is about 12544.3764691594. The cubic root of 157361381 is about 539.8826688383.

The spelling of 157361381 in words is "one hundred fifty-seven million, three hundred sixty-one thousand, three hundred eighty-one".