72918525 has 24 divisors (see below), whose sum is σ = 127652544. Its totient is φ = 36601600.

The previous prime is 72918481. The next prime is 72918553. The reversal of 72918525 is 52581927.

It is not a de Polignac number, because 72918525 - 2⁸ = 72918269 is a prime.

It is a super-2 number, since 2×72918525² = 10634222576351250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27321 + ... + 29870.

It is an arithmetic number, because the mean of its divisors is an integer number (5318856).

Almost surely, 2^72918525 is an apocalyptic number.

72918525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72918525 is a deficient number, since it is larger than the sum of its proper divisors (54734019).

72918525 is a wasteful number, since it uses less digits than its factorization.

72918525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57221 (or 57216 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 72918525 is about 8539.2344504645. The cubic root of 72918525 is about 417.7783769802.

The spelling of 72918525 in words is "seventy-two million, nine hundred eighteen thousand, five hundred twenty-five".