215402132 has 12 divisors (see below), whose sum is σ = 411222336. Its totient is φ = 97910040.

The previous prime is 215402129. The next prime is 215402171. The reversal of 215402132 is 231204512.

215402132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447708 + ... + 2447795.

It is an arithmetic number, because the mean of its divisors is an integer number (34268528).

Almost surely, 2^215402132 is an apocalyptic number.

215402132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215402132 is a deficient number, since it is larger than the sum of its proper divisors (195820204).

215402132 is a wasteful number, since it uses less digits than its factorization.

215402132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895518 (or 4895516 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 215402132 is about 14676.5844800485. The cubic root of 215402132 is about 599.4459069776.

Adding to 215402132 its reverse (231204512), we get a palindrome (446606644).

The spelling of 215402132 in words is "two hundred fifteen million, four hundred two thousand, one hundred thirty-two".