3881257157 has 4 divisors (see below), whose sum is σ = 3883097856. Its totient is φ = 3879416460.

The previous prime is 3881257141. The next prime is 3881257181. The reversal of 3881257157 is 7517521883.

It is a happy number.

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: 7517521883 = 149 ⋅50453167.

It is a cyclic number.

It is not a de Polignac number, because 3881257157 - 2⁴ = 3881257141 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 (3881253157) 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, 917183 + ... + 921404.

It is an arithmetic number, because the mean of its divisors is an integer number (970774464).

Almost surely, 2^3881257157 is an apocalyptic number.

It is an amenable number.

3881257157 is a deficient number, since it is larger than the sum of its proper divisors (1840699).

3881257157 is a wasteful number, since it uses less digits than its factorization.

3881257157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840698.

The product of its digits is 470400, while the sum is 47.

The square root of 3881257157 is about 62299.7364119625. The cubic root of 3881257157 is about 1571.5352957233.

The spelling of 3881257157 in words is "three billion, eight hundred eighty-one million, two hundred fifty-seven thousand, one hundred fifty-seven".