215804743092 has 18 divisors (see below), whose sum is σ = 545506434018. Its totient is φ = 71934914352.

The previous prime is 215804743069. The next prime is 215804743117. The reversal of 215804743092 is 290347408512.

215804743092 is a `hidden beast` number, since 2 + 15 + 80 + 47 + 430 + 92 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128569576356 + 87235166736 = 358566^2 + 295356^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2997288063 + ... + 2997288134.

It is an arithmetic number, because the mean of its divisors is an integer number (30305913001).

Almost surely, 2^215804743092 is an apocalyptic number.

It is an amenable number.

215804743092 is an abundant number, since it is smaller than the sum of its proper divisors (329701690926).

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

215804743092 is a wasteful number, since it uses less digits than its factorization.

215804743092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994576207 (or 5994576202 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 215804743092 in words is "two hundred fifteen billion, eight hundred four million, seven hundred forty-three thousand, ninety-two".