215139932 has 24 divisors (see below), whose sum is σ = 438401376. Its totient is φ = 90462528.

The previous prime is 215139887. The next prime is 215139943. The reversal of 215139932 is 239931512.

215139932 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 215139892 and 215139901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71003 + ... + 73970.

It is an arithmetic number, because the mean of its divisors is an integer number (18266724).

Almost surely, 2^215139932 is an apocalyptic number.

It is an amenable number.

215139932 is an abundant number, since it is smaller than the sum of its proper divisors (223261444).

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

215139932 is a wasteful number, since it uses less digits than its factorization.

215139932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145037 (or 145035 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 215139932 is about 14667.6491640617. The cubic root of 215139932 is about 599.2025814162.

The spelling of 215139932 in words is "two hundred fifteen million, one hundred thirty-nine thousand, nine hundred thirty-two".