72527531 has 2 divisors, whose sum is σ = 72527532. Its totient is φ = 72527530.

The previous prime is 72527513. The next prime is 72527537. The reversal of 72527531 is 13572527.

Together with previous prime (72527513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13572527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72527531 - 2¹⁰ = 72526507 is a prime.

It is a super-2 number, since 2×72527531² = 10520485505911922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72527537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36263765 + 36263766.

It is an arithmetic number, because the mean of its divisors is an integer number (36263766).

Almost surely, 2^72527531 is an apocalyptic number.

72527531 is a deficient number, since it is larger than the sum of its proper divisors (1).

72527531 is an equidigital number, since it uses as much as digits as its factorization.

72527531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 32.

The square root of 72527531 is about 8516.3097055004. The cubic root of 72527531 is about 417.0303198208.

The spelling of 72527531 in words is "seventy-two million, five hundred twenty-seven thousand, five hundred thirty-one".