157143881 has 8 divisors (see below), whose sum is σ = 158478600. Its totient is φ = 155814912.

The previous prime is 157143839. The next prime is 157143901. The reversal of 157143881 is 188341751.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13623481 + 143520400 = 3691^2 + 11980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157143881 - 2¹⁰ = 157142857 is a prime.

It is a super-2 number, since 2×157143881² = 49388398671484322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157145881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66191 + ... + 68523.

It is an arithmetic number, because the mean of its divisors is an integer number (19809825).

Almost surely, 2^157143881 is an apocalyptic number.

It is an amenable number.

157143881 is a deficient number, since it is larger than the sum of its proper divisors (1334719).

157143881 is a wasteful number, since it uses less digits than its factorization.

157143881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875.

The product of its digits is 26880, while the sum is 38.

The square root of 157143881 is about 12535.7042482662. The cubic root of 157143881 is about 539.6338178147.

The spelling of 157143881 in words is "one hundred fifty-seven million, one hundred forty-three thousand, eight hundred eighty-one".