157216161 has 4 divisors (see below), whose sum is σ = 209621552. Its totient is φ = 104810772.

The previous prime is 157216151. The next prime is 157216207. The reversal of 157216161 is 161612751.

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: 161612751 = 3 ⋅53870917.

It is not a de Polignac number, because 157216161 - 2¹⁰ = 157215137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157216121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26202691 + ... + 26202696.

It is an arithmetic number, because the mean of its divisors is an integer number (52405388).

Almost surely, 2^157216161 is an apocalyptic number.

It is an amenable number.

157216161 is a deficient number, since it is larger than the sum of its proper divisors (52405391).

157216161 is an equidigital number, since it uses as much as digits as its factorization.

157216161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52405390.

The product of its digits is 2520, while the sum is 30.

The square root of 157216161 is about 12538.5868821012. The cubic root of 157216161 is about 539.7165419047.

The spelling of 157216161 in words is "one hundred fifty-seven million, two hundred sixteen thousand, one hundred sixty-one".