215406104 has 32 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 103676160.

The previous prime is 215406101. The next prime is 215406131. The reversal of 215406104 is 401604512.

215406104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 215406104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215406101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46652 + ... + 51060.

It is an arithmetic number, because the mean of its divisors is an integer number (13097700).

Almost surely, 2^215406104 is an apocalyptic number.

It is an amenable number.

215406104 is a deficient number, since it is larger than the sum of its proper divisors (203720296).

215406104 is a wasteful number, since it uses less digits than its factorization.

215406104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643 (or 4639 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 215406104 is about 14676.7197970119. The cubic root of 215406104 is about 599.4495915349.

The spelling of 215406104 in words is "two hundred fifteen million, four hundred six thousand, one hundred four".