72752251 has 16 divisors (see below), whose sum is σ = 86929920. Its totient is φ = 60009120.

The previous prime is 72752233. The next prime is 72752261. The reversal of 72752251 is 15225727.

It is a cyclic number.

It is not a de Polignac number, because 72752251 - 2⁷ = 72752123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72752221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4126 + ... + 12748.

It is an arithmetic number, because the mean of its divisors is an integer number (5433120).

Almost surely, 2^72752251 is an apocalyptic number.

72752251 is a deficient number, since it is larger than the sum of its proper divisors (14177669).

72752251 is a wasteful number, since it uses less digits than its factorization.

72752251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8706.

The product of its digits is 9800, while the sum is 31.

The square root of 72752251 is about 8529.4930095522. The cubic root of 72752251 is about 417.4605859980.

Adding to 72752251 its reverse (15225727), we get a palindrome (87977978).

The spelling of 72752251 in words is "seventy-two million, seven hundred fifty-two thousand, two hundred fifty-one".