215244795930 has 128 divisors (see below), whose sum is σ = 553535078400. Its totient is φ = 53408968704.

The previous prime is 215244795881. The next prime is 215244795971. The reversal of 215244795930 is 39597442512.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8678407 + ... + 8703173.

It is an arithmetic number, because the mean of its divisors is an integer number (4324492800).

Almost surely, 2^215244795930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215244795930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276767539200).

215244795930 is an abundant number, since it is smaller than the sum of its proper divisors (338290282470).

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

215244795930 is a wasteful number, since it uses less digits than its factorization.

215244795930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25068.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 215244795930 in words is "two hundred fifteen billion, two hundred forty-four million, seven hundred ninety-five thousand, nine hundred thirty".