72510051 has 4 divisors (see below), whose sum is σ = 96680072. Its totient is φ = 48340032.

The previous prime is 72510041. The next prime is 72510059. The reversal of 72510051 is 15001527.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72510051 - 2⁷ = 72509923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72510059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12085006 + ... + 12085011.

It is an arithmetic number, because the mean of its divisors is an integer number (24170018).

Almost surely, 2^72510051 is an apocalyptic number.

72510051 is a deficient number, since it is larger than the sum of its proper divisors (24170021).

72510051 is a wasteful number, since it uses less digits than its factorization.

72510051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24170020.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 72510051 is about 8515.2833775512. The cubic root of 72510051 is about 416.9968140352.

Adding to 72510051 its reverse (15001527), we get a palindrome (87511578).

The spelling of 72510051 in words is "seventy-two million, five hundred ten thousand, fifty-one".