100072556 has 12 divisors (see below), whose sum is σ = 175450968. Its totient is φ = 49943712.

The previous prime is 100072507. The next prime is 100072613. The reversal of 100072556 is 655270001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20681 + ... + 25056.

It is an arithmetic number, because the mean of its divisors is an integer number (14620914).

Almost surely, 2^100072556 is an apocalyptic number.

It is an amenable number.

100072556 is a deficient number, since it is larger than the sum of its proper divisors (75378412).

100072556 is a wasteful number, since it uses less digits than its factorization.

100072556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46288 (or 46286 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 100072556 is about 10003.6271421920. The cubic root of 100072556 is about 464.2711145953.

The spelling of 100072556 in words is "one hundred million, seventy-two thousand, five hundred fifty-six".