161140552 has 32 divisors (see below), whose sum is σ = 323530200. Its totient is φ = 74973184.

The previous prime is 161140549. The next prime is 161140583. The reversal of 161140552 is 255041161.

It is a happy number.

161140552 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 126023076 + 35117476 = 11226^2 + 5926^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5448 + ... + 18760.

Almost surely, 2^161140552 is an apocalyptic number.

It is an amenable number.

161140552 is an abundant number, since it is smaller than the sum of its proper divisors (162389648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161140552 is a wasteful number, since it uses less digits than its factorization.

161140552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13425 (or 13421 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 161140552 is about 12694.1148568933. The cubic root of 161140552 is about 544.1704429158.

The spelling of 161140552 in words is "one hundred sixty-one million, one hundred forty thousand, five hundred fifty-two".