157622881 has 4 divisors (see below), whose sum is σ = 169747732. Its totient is φ = 145498032.

The previous prime is 157622863. The next prime is 157622897. The reversal of 157622881 is 188226751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85100625 + 72522256 = 9225^2 + 8516^2 .

It is a cyclic number.

It is not a de Polignac number, because 157622881 - 2⁹ = 157622369 is a prime.

It is a super-2 number, since 2×157622881² = 49689945229480322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157622831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6062406 + ... + 6062431.

It is an arithmetic number, because the mean of its divisors is an integer number (42436933).

Almost surely, 2^157622881 is an apocalyptic number.

It is an amenable number.

157622881 is a deficient number, since it is larger than the sum of its proper divisors (12124851).

157622881 is a wasteful number, since it uses less digits than its factorization.

157622881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124850.

The product of its digits is 53760, while the sum is 40.

The square root of 157622881 is about 12554.7951397066. The cubic root of 157622881 is about 540.1815587483.

The spelling of 157622881 in words is "one hundred fifty-seven million, six hundred twenty-two thousand, eight hundred eighty-one".