215690631412 has 12 divisors (see below), whose sum is σ = 377938227520. Its totient is φ = 107708280696.

The previous prime is 215690631371. The next prime is 215690631421. The reversal of 215690631412 is 214136096512.

It is a super-2 number, since 2×215690631412² (a number of 23 digits) contains 22 as substring.

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, 34255212 + ... + 34261507.

Almost surely, 2^215690631412 is an apocalyptic number.

It is an amenable number.

215690631412 is a deficient number, since it is larger than the sum of its proper divisors (162247596108).

215690631412 is a wasteful number, since it uses less digits than its factorization.

215690631412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68517510 (or 68517508 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 215690631412 in words is "two hundred fifteen billion, six hundred ninety million, six hundred thirty-one thousand, four hundred twelve".