215401332 has 12 divisors (see below), whose sum is σ = 502603136. Its totient is φ = 71800440.

The previous prime is 215401327. The next prime is 215401337. The reversal of 215401332 is 233104512.

It is an interprime number because it is at equal distance from previous prime (215401327) and next prime (215401337).

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 215401299 and 215401308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215401337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8975044 + ... + 8975067.

Almost surely, 2^215401332 is an apocalyptic number.

It is an amenable number.

215401332 is an abundant number, since it is smaller than the sum of its proper divisors (287201804).

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

215401332 is a wasteful number, since it uses less digits than its factorization.

215401332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17950118 (or 17950116 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 215401332 is about 14676.5572257257. The cubic root of 215401332 is about 599.4451648659.

Adding to 215401332 its reverse (233104512), we get a palindrome (448505844).

The spelling of 215401332 in words is "two hundred fifteen million, four hundred one thousand, three hundred thirty-two".