161252155 has 4 divisors (see below), whose sum is σ = 193502592. Its totient is φ = 129001720.

The previous prime is 161252099. The next prime is 161252171. The reversal of 161252155 is 551252161.

161252155 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 not a de Polignac number, because 161252155 - 2¹⁹ = 160727867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16125211 + ... + 16125220.

It is an arithmetic number, because the mean of its divisors is an integer number (48375648).

Almost surely, 2^161252155 is an apocalyptic number.

161252155 is a deficient number, since it is larger than the sum of its proper divisors (32250437).

161252155 is an equidigital number, since it uses as much as digits as its factorization.

161252155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32250436.

The product of its digits is 3000, while the sum is 28.

The square root of 161252155 is about 12698.5099519589. The cubic root of 161252155 is about 544.2960414242.

The spelling of 161252155 in words is "one hundred sixty-one million, two hundred fifty-two thousand, one hundred fifty-five".