72215402 has 16 divisors (see below), whose sum is σ = 124493760. Its totient is φ = 30775488.

The previous prime is 72215369. The next prime is 72215431. The reversal of 72215402 is 20451227.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11903 + ... + 16914.

It is an arithmetic number, because the mean of its divisors is an integer number (7780860).

Almost surely, 2^72215402 is an apocalyptic number.

72215402 is a deficient number, since it is larger than the sum of its proper divisors (52278358).

72215402 is a wasteful number, since it uses less digits than its factorization.

72215402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29005.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 72215402 is about 8497.9645798273. The cubic root of 72215402 is about 416.4312165947.

Adding to 72215402 its reverse (20451227), we get a palindrome (92666629).

The spelling of 72215402 in words is "seventy-two million, two hundred fifteen thousand, four hundred two".