161225552 has 20 divisors (see below), whose sum is σ = 330750036. Its totient is φ = 75870720.

The previous prime is 161225551. The next prime is 161225563. The reversal of 161225552 is 255522161.

It can be written as a sum of positive squares in 2 ways, for example, as 109327936 + 51897616 = 10456^2 + 7204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161225551) 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, 296099 + ... + 296642.

Almost surely, 2^161225552 is an apocalyptic number.

It is an amenable number.

161225552 is an abundant number, since it is smaller than the sum of its proper divisors (169524484).

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

161225552 is a wasteful number, since it uses less digits than its factorization.

161225552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592766 (or 592760 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 161225552 is about 12697.4624236499. The cubic root of 161225552 is about 544.2661075525.

The spelling of 161225552 in words is "one hundred sixty-one million, two hundred twenty-five thousand, five hundred fifty-two".