72315524051 has 4 divisors (see below), whose sum is σ = 74269997712. Its totient is φ = 70361050392.

The previous prime is 72315524023. The next prime is 72315524063. The reversal of 72315524051 is 15042551327.

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

It is a cyclic number.

It is not a de Polignac number, because 72315524051 - 2³⁴ = 55135654867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72315524251) 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, 977236775 + ... + 977236848.

It is an arithmetic number, because the mean of its divisors is an integer number (18567499428).

Almost surely, 2^72315524051 is an apocalyptic number.

72315524051 is a deficient number, since it is larger than the sum of its proper divisors (1954473661).

72315524051 is a wasteful number, since it uses less digits than its factorization.

72315524051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954473660.

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 72315524051 in words is "seventy-two billion, three hundred fifteen million, five hundred twenty-four thousand, fifty-one".