215402106 has 16 divisors (see below), whose sum is σ = 431048448. Its totient is φ = 71760000.

The previous prime is 215402071. The next prime is 215402113. The reversal of 215402106 is 601204512.

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, 2506 + ... + 20906.

It is an arithmetic number, because the mean of its divisors is an integer number (26940528).

Almost surely, 2^215402106 is an apocalyptic number.

215402106 is an abundant number, since it is smaller than the sum of its proper divisors (215646342).

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

215402106 is a wasteful number, since it uses less digits than its factorization.

215402106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20357.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 215402106 is about 14676.5835942838. The cubic root of 215402106 is about 599.4458828590.

Adding to 215402106 its reverse (601204512), we get a palindrome (816606618).

The spelling of 215402106 in words is "two hundred fifteen million, four hundred two thousand, one hundred six".