721463131 has 8 divisors (see below), whose sum is σ = 746640720. Its totient is φ = 696305568.

The previous prime is 721463089. The next prime is 721463137. The reversal of 721463131 is 131364127.

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 721463131 - 2²⁷ = 587245403 is a prime.

It is a super-2 number, since 2×721463131² = 1041018098784646322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 721463131.

It is not an unprimeable number, because it can be changed into a prime (721463137) 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, 136225 + ... + 141421.

It is an arithmetic number, because the mean of its divisors is an integer number (93330090).

Almost surely, 2^721463131 is an apocalyptic number.

721463131 is a deficient number, since it is larger than the sum of its proper divisors (25177589).

721463131 is a wasteful number, since it uses less digits than its factorization.

721463131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10013.

The product of its digits is 3024, while the sum is 28.

The square root of 721463131 is about 26860.0657296292. The cubic root of 721463131 is about 896.8876572507.

The spelling of 721463131 in words is "seven hundred twenty-one million, four hundred sixty-three thousand, one hundred thirty-one".