72563381 has 8 divisors (see below), whose sum is σ = 79307424. Its totient is φ = 65843920.

The previous prime is 72563377. The next prime is 72563411. The reversal of 72563381 is 18336527.

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 72563381 - 2² = 72563377 is a prime.

It is a super-2 number, since 2×72563381² = 10530888524302322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72563311) 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, 335 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (9913428).

Almost surely, 2^72563381 is an apocalyptic number.

It is an amenable number.

72563381 is a deficient number, since it is larger than the sum of its proper divisors (6744043).

72563381 is a wasteful number, since it uses less digits than its factorization.

72563381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12291.

The product of its digits is 30240, while the sum is 35.

The square root of 72563381 is about 8518.4142303600. The cubic root of 72563381 is about 417.0990205110.

The spelling of 72563381 in words is "seventy-two million, five hundred sixty-three thousand, three hundred eighty-one".