161275051 has 8 divisors (see below), whose sum is σ = 190260224. Its totient is φ = 133776360.

The previous prime is 161275043. The next prime is 161275063. The reversal of 161275051 is 150572161.

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 161275051 - 2³ = 161275043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161275091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371385 + ... + 371818.

It is an arithmetic number, because the mean of its divisors is an integer number (23782528).

Almost surely, 2^161275051 is an apocalyptic number.

161275051 is a deficient number, since it is larger than the sum of its proper divisors (28985173).

161275051 is an equidigital number, since it uses as much as digits as its factorization.

161275051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743241.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 161275051 is about 12699.4114430551. The cubic root of 161275051 is about 544.3218015189.

The spelling of 161275051 in words is "one hundred sixty-one million, two hundred seventy-five thousand, fifty-one".