161577051 has 4 divisors (see below), whose sum is σ = 215436072. Its totient is φ = 107718032.

The previous prime is 161577049. The next prime is 161577077. The reversal of 161577051 is 150775161.

161577051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 161577051 - 2¹ = 161577049 is a prime.

It is a super-2 number, since 2×161577051² = 52214286819713202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161577151) 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, 26929506 + ... + 26929511.

It is an arithmetic number, because the mean of its divisors is an integer number (53859018).

Almost surely, 2^161577051 is an apocalyptic number.

161577051 is a deficient number, since it is larger than the sum of its proper divisors (53859021).

161577051 is an equidigital number, since it uses as much as digits as its factorization.

161577051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53859020.

The product of its (nonzero) digits is 7350, while the sum is 33.

The square root of 161577051 is about 12711.2961966906. The cubic root of 161577051 is about 544.6613512130.

The spelling of 161577051 in words is "one hundred sixty-one million, five hundred seventy-seven thousand, fifty-one".