99972250 has 48 divisors (see below), whose sum is σ = 217729512. Its totient is φ = 34272000.

The previous prime is 99972233. The next prime is 99972269. The reversal of 99972250 is 5227999.

It can be written as a sum of positive squares in 4 ways, for example, as 23532201 + 76440049 = 4851^2 + 8743^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99972197 and 99972206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8170 + ... + 16330.

Almost surely, 2^99972250 is an apocalyptic number.

99972250 is an abundant number, since it is smaller than the sum of its proper divisors (117757262).

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

99972250 is a wasteful number, since it uses less digits than its factorization.

99972250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192 (or 8175 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 99972250 is about 9998.6124037288. The cubic root of 99972250 is about 464.1159446925.

The spelling of 99972250 in words is "ninety-nine million, nine hundred seventy-two thousand, two hundred fifty".