215403930 has 48 divisors (see below), whose sum is σ = 640059264. Its totient is φ = 49235040.

The previous prime is 215403917. The next prime is 215403959. The reversal of 215403930 is 39304512.

It is a junction number, because it is equal to n+sod(n) for n = 215403894 and 215403903.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170326 + ... + 171585.

It is an arithmetic number, because the mean of its divisors is an integer number (13334568).

Almost surely, 2^215403930 is an apocalyptic number.

215403930 is an abundant number, since it is smaller than the sum of its proper divisors (424655334).

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

215403930 is a wasteful number, since it uses less digits than its factorization.

215403930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341931 (or 341928 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 215403930 is about 14676.6457339543. The cubic root of 215403930 is about 599.4475748669.

The spelling of 215403930 in words is "two hundred fifteen million, four hundred three thousand, nine hundred thirty".