161153501 has 4 divisors (see below), whose sum is σ = 161723232. Its totient is φ = 160583772.

The previous prime is 161153471. The next prime is 161153519. The reversal of 161153501 is 105351161.

161153501 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161153501 - 2²⁶ = 94044637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161153581) 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, 284441 + ... + 285006.

It is an arithmetic number, because the mean of its divisors is an integer number (40430808).

Almost surely, 2^161153501 is an apocalyptic number.

It is an amenable number.

161153501 is a deficient number, since it is larger than the sum of its proper divisors (569731).

161153501 is an equidigital number, since it uses as much as digits as its factorization.

161153501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569730.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 161153501 is about 12694.6248861477. The cubic root of 161153501 is about 544.1850187508.

The spelling of 161153501 in words is "one hundred sixty-one million, one hundred fifty-three thousand, five hundred one".