252215402 has 8 divisors (see below), whose sum is σ = 379540512. Its totient is φ = 125701900.

The previous prime is 252215389. The next prime is 252215413. The reversal of 252215402 is 204512252.

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

It is a super-2 number, since 2×252215402² = 127225218012043208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202124 + ... + 203367.

It is an arithmetic number, because the mean of its divisors is an integer number (47442564).

Almost surely, 2^252215402 is an apocalyptic number.

252215402 is a deficient number, since it is larger than the sum of its proper divisors (127325110).

252215402 is a wasteful number, since it uses less digits than its factorization.

252215402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405804.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 252215402 is about 15881.2909424895. The cubic root of 252215402 is about 631.8158763027.

Adding to 252215402 its reverse (204512252), we get a palindrome (456727654).

The spelling of 252215402 in words is "two hundred fifty-two million, two hundred fifteen thousand, four hundred two".