38157131 has 4 divisors (see below), whose sum is σ = 38219592. Its totient is φ = 38094672.

The previous prime is 38157109. The next prime is 38157137. The reversal of 38157131 is 13175183.

38157131 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 an emirpimes, since its reverse is a distinct semiprime: 13175183 = 7 ⋅1882169.

It is a cyclic number.

It is not a de Polignac number, because 38157131 - 2²² = 33962827 is a prime.

It is a super-2 number, since 2×38157131² = 2911933292302322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38157094 and 38157103.

It is not an unprimeable number, because it can be changed into a prime (38157137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30305 + ... + 31538.

It is an arithmetic number, because the mean of its divisors is an integer number (9554898).

Almost surely, 2^38157131 is an apocalyptic number.

38157131 is a deficient number, since it is larger than the sum of its proper divisors (62461).

38157131 is an equidigital number, since it uses as much as digits as its factorization.

38157131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62460.

The product of its digits is 2520, while the sum is 29.

The square root of 38157131 is about 6177.1458619657. The cubic root of 38157131 is about 336.6602986520.

The spelling of 38157131 in words is "thirty-eight million, one hundred fifty-seven thousand, one hundred thirty-one".