161229252 has 24 divisors (see below), whose sum is σ = 376409376. Its totient is φ = 53713408.

The previous prime is 161229251. The next prime is 161229259. The reversal of 161229252 is 252922161.

161229252 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161229251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35503 + ... + 39785.

It is an arithmetic number, because the mean of its divisors is an integer number (15683724).

Almost surely, 2^161229252 is an apocalyptic number.

161229252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161229252 is an abundant number, since it is smaller than the sum of its proper divisors (215180124).

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

161229252 is a wasteful number, since it uses less digits than its factorization.

161229252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427 (or 7425 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 161229252 is about 12697.6081212172. The cubic root of 161229252 is about 544.2702710141.

The spelling of 161229252 in words is "one hundred sixty-one million, two hundred twenty-nine thousand, two hundred fifty-two".