99551572 has 6 divisors (see below), whose sum is σ = 174215258. Its totient is φ = 49775784.

The previous prime is 99551561. The next prime is 99551581. The reversal of 99551572 is 27515599.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77686596 + 21864976 = 8814^2 + 4676^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12443943 + ... + 12443950.

Almost surely, 2^99551572 is an apocalyptic number.

It is an amenable number.

99551572 is a deficient number, since it is larger than the sum of its proper divisors (74663686).

99551572 is a wasteful number, since it uses less digits than its factorization.

99551572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24887897 (or 24887895 counting only the distinct ones).

The product of its digits is 141750, while the sum is 43.

The square root of 99551572 is about 9977.5534075243. The cubic root of 99551572 is about 463.4640375638.

The spelling of 99551572 in words is "ninety-nine million, five hundred fifty-one thousand, five hundred seventy-two".