161553351 has 4 divisors (see below), whose sum is σ = 215404472. Its totient is φ = 107702232.

The previous prime is 161553347. The next prime is 161553361. The reversal of 161553351 is 153355161.

161553351 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 161553351 - 2² = 161553347 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 (161553331) 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, 26925556 + ... + 26925561.

It is an arithmetic number, because the mean of its divisors is an integer number (53851118).

Almost surely, 2^161553351 is an apocalyptic number.

161553351 is a deficient number, since it is larger than the sum of its proper divisors (53851121).

161553351 is an equidigital number, since it uses as much as digits as its factorization.

161553351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53851120.

The product of its digits is 6750, while the sum is 30.

The square root of 161553351 is about 12710.3639208325. The cubic root of 161553351 is about 544.6347197388.

The spelling of 161553351 in words is "one hundred sixty-one million, five hundred fifty-three thousand, three hundred fifty-one".