64215372 has 24 divisors (see below), whose sum is σ = 161362096. Its totient is φ = 19758528.

The previous prime is 64215343. The next prime is 64215401. The reversal of 64215372 is 27351246.

It is an interprime number because it is at equal distance from previous prime (64215343) and next prime (64215401).

It is a super-2 number, since 2×64215372² = 8247228002196768, which contains 22 as substring.

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, 205663 + ... + 205974.

Almost surely, 2^64215372 is an apocalyptic number.

It is an amenable number.

64215372 is an abundant number, since it is smaller than the sum of its proper divisors (97146724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64215372 is a wasteful number, since it uses less digits than its factorization.

64215372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411657 (or 411655 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 64215372 is about 8013.4494445276. The cubic root of 64215372 is about 400.4481892950.

The spelling of 64215372 in words is "sixty-four million, two hundred fifteen thousand, three hundred seventy-two".