157681571 has 8 divisors (see below), whose sum is σ = 160565760. Its totient is φ = 154804552.

The previous prime is 157681547. The next prime is 157681591. The reversal of 157681571 is 175186751.

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 157681571 - 2¹⁴ = 157665187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157681501) 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 7 ways as a sum of consecutive naturals, for example, 63866 + ... + 66288.

It is an arithmetic number, because the mean of its divisors is an integer number (20070720).

Almost surely, 2^157681571 is an apocalyptic number.

157681571 is a deficient number, since it is larger than the sum of its proper divisors (2884189).

157681571 is a wasteful number, since it uses less digits than its factorization.

157681571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585.

The product of its digits is 58800, while the sum is 41.

The square root of 157681571 is about 12557.1322761210. The cubic root of 157681571 is about 540.2485949583.

The spelling of 157681571 in words is "one hundred fifty-seven million, six hundred eighty-one thousand, five hundred seventy-one".