72532551 has 32 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 38104704.

The previous prime is 72532541. The next prime is 72532571. The reversal of 72532551 is 15523527.

It is not a de Polignac number, because 72532551 - 2⁶ = 72532487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72532511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105856 + ... + 106538.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^72532551 is an apocalyptic number.

72532551 is a deficient number, since it is larger than the sum of its proper divisors (46975929).

72532551 is a wasteful number, since it uses less digits than its factorization.

72532551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its digits is 10500, while the sum is 30.

The square root of 72532551 is about 8516.6044289963. The cubic root of 72532551 is about 417.0399411966.

The spelling of 72532551 in words is "seventy-two million, five hundred thirty-two thousand, five hundred fifty-one".