161925300 has 54 divisors (see below), whose sum is σ = 507548678. Its totient is φ = 43179840.

The previous prime is 161925287. The next prime is 161925317. The reversal of 161925300 is 3529161.

It can be written as a sum of positive squares in 3 ways, for example, as 35497764 + 126427536 = 5958^2 + 11244^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 89059 + ... + 90858.

Almost surely, 2^161925300 is an apocalyptic number.

161925300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161925300 is an abundant number, since it is smaller than the sum of its proper divisors (345623378).

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

161925300 is a wasteful number, since it uses less digits than its factorization.

161925300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179937 (or 179927 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 161925300 is about 12724.9872298561. The cubic root of 161925300 is about 545.0523755180.

The spelling of 161925300 in words is "one hundred sixty-one million, nine hundred twenty-five thousand, three hundred".