72599551 has 8 divisors (see below), whose sum is σ = 78886400. Its totient is φ = 66559320.

The previous prime is 72599543. The next prime is 72599567. The reversal of 72599551 is 15599527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72599551 - 2³ = 72599543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72599498 and 72599507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72599531) 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, 61041 + ... + 62218.

It is an arithmetic number, because the mean of its divisors is an integer number (9860800).

Almost surely, 2^72599551 is an apocalyptic number.

72599551 is the 3811-st centered decagonal number.

72599551 is a deficient number, since it is larger than the sum of its proper divisors (6286849).

72599551 is a wasteful number, since it uses less digits than its factorization.

72599551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123309.

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

The square root of 72599551 is about 8520.5370135925. The cubic root of 72599551 is about 417.1683115013.

The spelling of 72599551 in words is "seventy-two million, five hundred ninety-nine thousand, five hundred fifty-one".