72152051 has 4 divisors (see below), whose sum is σ = 72193704. Its totient is φ = 72110400.

The previous prime is 72152039. The next prime is 72152107. The reversal of 72152051 is 15025127.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72152051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72152011) 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, 18110 + ... + 21731.

It is an arithmetic number, because the mean of its divisors is an integer number (18048426).

Almost surely, 2^72152051 is an apocalyptic number.

72152051 is a deficient number, since it is larger than the sum of its proper divisors (41653).

72152051 is a wasteful number, since it uses less digits than its factorization.

72152051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41652.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 72152051 is about 8494.2363400132. The cubic root of 72152051 is about 416.3094094668.

Adding to 72152051 its reverse (15025127), we get a palindrome (87177178).

The spelling of 72152051 in words is "seventy-two million, one hundred fifty-two thousand, fifty-one".