72133287 has 8 divisors (see below), whose sum is σ = 96385536. Its totient is φ = 47984952.

The previous prime is 72133279. The next prime is 72133289. The reversal of 72133287 is 78233127.

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

It is not a de Polignac number, because 72133287 - 2³ = 72133279 is a prime.

It is a super-2 number, since 2×72133287² = 10406422186848738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72133289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24343 + ... + 27144.

It is an arithmetic number, because the mean of its divisors is an integer number (12048192).

Almost surely, 2^72133287 is an apocalyptic number.

72133287 is a deficient number, since it is larger than the sum of its proper divisors (24252249).

72133287 is a wasteful number, since it uses less digits than its factorization.

72133287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51957.

The product of its digits is 14112, while the sum is 33.

The square root of 72133287 is about 8493.1317545414. The cubic root of 72133287 is about 416.2733175983.

The spelling of 72133287 in words is "seventy-two million, one hundred thirty-three thousand, two hundred eighty-seven".