215690412 has 48 divisors (see below), whose sum is σ = 600187392. Its totient is φ = 58945920.

The previous prime is 215690411. The next prime is 215690437. The reversal of 215690412 is 214096512.

215690412 is digitally balanced in base 3, 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 215690412.

It is not an unprimeable number, because it can be changed into a prime (215690411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53889 + ... + 57752.

It is an arithmetic number, because the mean of its divisors is an integer number (12503904).

Almost surely, 2^215690412 is an apocalyptic number.

It is an amenable number.

215690412 is an abundant number, since it is smaller than the sum of its proper divisors (384496980).

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

215690412 is a wasteful number, since it uses less digits than its factorization.

215690412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111678 (or 111676 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 215690412 is about 14686.4022823835. The cubic root of 215690412 is about 599.7132073829.

The spelling of 215690412 in words is "two hundred fifteen million, six hundred ninety thousand, four hundred twelve".