161122250 has 16 divisors (see below), whose sum is σ = 301621320. Its totient is φ = 64448800.

The previous prime is 161122189. The next prime is 161122253. The reversal of 161122250 is 52221161.

161122250 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 95981209 + 65141041 = 9797^2 + 8071^2 .

It is not an unprimeable number, because it can be changed into a prime (161122253) 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, 321995 + ... + 322494.

Almost surely, 2^161122250 is an apocalyptic number.

161122250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161122250 is a deficient number, since it is larger than the sum of its proper divisors (140499070).

161122250 is an equidigital number, since it uses as much as digits as its factorization.

161122250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644506 (or 644496 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 161122250 is about 12693.3939511858. The cubic root of 161122250 is about 544.1498402299.

The spelling of 161122250 in words is "one hundred sixty-one million, one hundred twenty-two thousand, two hundred fifty".