72501523 has 2 divisors, whose sum is σ = 72501524. Its totient is φ = 72501522.

The previous prime is 72501521. The next prime is 72501553. The reversal of 72501523 is 32510527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72501523 - 2¹ = 72501521 is a prime.

Together with 72501521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72501521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36250761 + 36250762.

It is an arithmetic number, because the mean of its divisors is an integer number (36250762).

Almost surely, 2^72501523 is an apocalyptic number.

72501523 is a deficient number, since it is larger than the sum of its proper divisors (1).

72501523 is an equidigital number, since it uses as much as digits as its factorization.

72501523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 72501523 is about 8514.7826161330. The cubic root of 72501523 is about 416.9804655511.

The spelling of 72501523 in words is "seventy-two million, five hundred one thousand, five hundred twenty-three".