161032250 has 16 divisors (see below), whose sum is σ = 301452840. Its totient is φ = 64412800.

The previous prime is 161032241. The next prime is 161032271. The reversal of 161032250 is 52230161.

It can be written as a sum of positive squares in 4 ways, for example, as 40844881 + 120187369 = 6391^2 + 10963^2 .

It is a congruent number.

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, 321815 + ... + 322314.

Almost surely, 2^161032250 is an apocalyptic number.

161032250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161032250 is a deficient number, since it is larger than the sum of its proper divisors (140420590).

161032250 is an equidigital number, since it uses as much as digits as its factorization.

161032250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644146 (or 644136 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 161032250 is about 12689.8483048459. The cubic root of 161032250 is about 544.0485039112.

The spelling of 161032250 in words is "one hundred sixty-one million, thirty-two thousand, two hundred fifty".