215490213939 has 96 divisors (see below), whose sum is σ = 389000102400. Its totient is φ = 103250949120.

The previous prime is 215490213923. The next prime is 215490213959. The reversal of 215490213939 is 939312094512.

215490213939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215490213939 - 2⁴ = 215490213923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215490213959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 79839412 + ... + 79842110.

It is an arithmetic number, because the mean of its divisors is an integer number (4052084400).

Almost surely, 2^215490213939 is an apocalyptic number.

215490213939 is a deficient number, since it is larger than the sum of its proper divisors (173509888461).

215490213939 is a wasteful number, since it uses less digits than its factorization.

215490213939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161 (or 5150 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 215490213939 in words is "two hundred fifteen billion, four hundred ninety million, two hundred thirteen thousand, nine hundred thirty-nine".