215478032924 has 72 divisors (see below), whose sum is σ = 478865882880. Its totient is φ = 83893404000.

The previous prime is 215478032899. The next prime is 215478032941. The reversal of 215478032924 is 429230874512.

It is a congruent number.

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, 3093917 + ... + 3162795.

It is an arithmetic number, because the mean of its divisors is an integer number (6650915040).

Almost surely, 2^215478032924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215478032924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239432941440).

215478032924 is an abundant number, since it is smaller than the sum of its proper divisors (263387849956).

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

215478032924 is a wasteful number, since it uses less digits than its factorization.

215478032924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70359 (or 70350 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 215478032924 in words is "two hundred fifteen billion, four hundred seventy-eight million, thirty-two thousand, nine hundred twenty-four".