72251663 has 8 divisors (see below), whose sum is σ = 79601616. Its totient is φ = 65032000.

The previous prime is 72251629. The next prime is 72251701. The reversal of 72251663 is 36615227.

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

It is not a de Polignac number, because 72251663 - 2¹⁰ = 72250639 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 (72251063) 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, 31406 + ... + 33627.

It is an arithmetic number, because the mean of its divisors is an integer number (9950202).

Almost surely, 2^72251663 is an apocalyptic number.

72251663 is a deficient number, since it is larger than the sum of its proper divisors (7349953).

72251663 is a wasteful number, since it uses less digits than its factorization.

72251663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65145.

The product of its digits is 15120, while the sum is 32.

The square root of 72251663 is about 8500.0978229665. The cubic root of 72251663 is about 416.5009048017.

It can be divided in two parts, 7225 and 1663, that added together give a palindrome (8888).

The spelling of 72251663 in words is "seventy-two million, two hundred fifty-one thousand, six hundred sixty-three".