215230402 has 24 divisors (see below), whose sum is σ = 342627012. Its totient is φ = 101337600.

The previous prime is 215230399. The next prime is 215230439. The reversal of 215230402 is 204032512.

It can be written as a sum of positive squares in 6 ways, for example, as 4661281 + 210569121 = 2159^2 + 14511^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215230402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67402 + ... + 70522.

Almost surely, 2^215230402 is an apocalyptic number.

215230402 is a deficient number, since it is larger than the sum of its proper divisors (127396610).

215230402 is a wasteful number, since it uses less digits than its factorization.

215230402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 215230402 is about 14670.7328378646. The cubic root of 215230402 is about 599.2865612708.

Adding to 215230402 its reverse (204032512), we get a palindrome (419262914).

The spelling of 215230402 in words is "two hundred fifteen million, two hundred thirty thousand, four hundred two".