72523517 has 8 divisors (see below), whose sum is σ = 79198560. Its totient is φ = 65862160.

The previous prime is 72523511. The next prime is 72523523. The reversal of 72523517 is 71532527.

It is an interprime number because it is at equal distance from previous prime (72523511) and next prime (72523523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72523517 - 2¹⁴ = 72507133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72523511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9959 + ... + 15627.

It is an arithmetic number, because the mean of its divisors is an integer number (9899820).

Almost surely, 2^72523517 is an apocalyptic number.

It is an amenable number.

72523517 is a deficient number, since it is larger than the sum of its proper divisors (6675043).

72523517 is a wasteful number, since it uses less digits than its factorization.

72523517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843.

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

The square root of 72523517 is about 8516.0740367848. The cubic root of 72523517 is about 417.0226262339.

It can be divided in two parts, 725 and 23517, that added together give a palindrome (24242).

The spelling of 72523517 in words is "seventy-two million, five hundred twenty-three thousand, five hundred seventeen".