215501515412 has 24 divisors (see below), whose sum is σ = 381292598400. Its totient is φ = 106567259040.

The previous prime is 215501515343. The next prime is 215501515417. The reversal of 215501515412 is 214515105512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215501515417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677639 + ... + 943502.

It is an arithmetic number, because the mean of its divisors is an integer number (15887191600).

Almost surely, 2^215501515412 is an apocalyptic number.

It is an amenable number.

215501515412 is a deficient number, since it is larger than the sum of its proper divisors (165791082988).

215501515412 is a wasteful number, since it uses less digits than its factorization.

215501515412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621511 (or 1621509 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 32.

The spelling of 215501515412 in words is "two hundred fifteen billion, five hundred one million, five hundred fifteen thousand, four hundred twelve".