161601051 has 4 divisors (see below), whose sum is σ = 215468072. Its totient is φ = 107734032.

The previous prime is 161601043. The next prime is 161601071. The reversal of 161601051 is 150106161.

161601051 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, and also an emirpimes, since its reverse is a distinct semiprime: 150106161 = 3 ⋅50035387.

It is not a de Polignac number, because 161601051 - 2³ = 161601043 is a prime.

It is a super-2 number, since 2×161601051² = 52229799368609202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161601001) 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, 26933506 + ... + 26933511.

It is an arithmetic number, because the mean of its divisors is an integer number (53867018).

Almost surely, 2^161601051 is an apocalyptic number.

161601051 is a deficient number, since it is larger than the sum of its proper divisors (53867021).

161601051 is an equidigital number, since it uses as much as digits as its factorization.

161601051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53867020.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 161601051 is about 12712.2402038350. The cubic root of 161601051 is about 544.6883171408.

The spelling of 161601051 in words is "one hundred sixty-one million, six hundred one thousand, fifty-one".