72152651 has 4 divisors (see below), whose sum is σ = 72409704. Its totient is φ = 71895600.

The previous prime is 72152623. The next prime is 72152653. The reversal of 72152651 is 15625127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15625127 = 7 ⋅2232161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72152651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72152653) 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, 128105 + ... + 128666.

It is an arithmetic number, because the mean of its divisors is an integer number (18102426).

Almost surely, 2^72152651 is an apocalyptic number.

72152651 is a deficient number, since it is larger than the sum of its proper divisors (257053).

72152651 is a wasteful number, since it uses less digits than its factorization.

72152651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257052.

The product of its digits is 4200, while the sum is 29.

The square root of 72152651 is about 8494.2716580058. The cubic root of 72152651 is about 416.3105634417.

Adding to 72152651 its reverse (15625127), we get a palindrome (87777778).

The spelling of 72152651 in words is "seventy-two million, one hundred fifty-two thousand, six hundred fifty-one".