157002161 has 4 divisors (see below), whose sum is σ = 160831524. Its totient is φ = 153172800.

The previous prime is 157002133. The next prime is 157002199. The reversal of 157002161 is 161200751.

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 72931600 + 84070561 = 8540^2 + 9169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157002161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157002061) 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, 1914620 + ... + 1914701.

It is an arithmetic number, because the mean of its divisors is an integer number (40207881).

Almost surely, 2^157002161 is an apocalyptic number.

It is an amenable number.

157002161 is a deficient number, since it is larger than the sum of its proper divisors (3829363).

157002161 is an equidigital number, since it uses as much as digits as its factorization.

157002161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829362.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 157002161 is about 12530.0503191328. The cubic root of 157002161 is about 539.4715463433.

The spelling of 157002161 in words is "one hundred fifty-seven million, two thousand, one hundred sixty-one".