72912051 has 6 divisors (see below), whose sum is σ = 105317420. Its totient is φ = 48608028.

The previous prime is 72912043. The next prime is 72912053. The reversal of 72912051 is 15021927.

It is not a de Polignac number, because 72912051 - 2³ = 72912043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72912053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4050661 + ... + 4050678.

Almost surely, 2^72912051 is an apocalyptic number.

72912051 is a deficient number, since it is larger than the sum of its proper divisors (32405369).

72912051 is a wasteful number, since it uses less digits than its factorization.

72912051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101345 (or 8101342 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 72912051 is about 8538.8553682563. The cubic root of 72912051 is about 417.7660125993.

Adding to 72912051 its reverse (15021927), we get a palindrome (87933978).

The spelling of 72912051 in words is "seventy-two million, nine hundred twelve thousand, fifty-one".