215688451002 has 32 divisors (see below), whose sum is σ = 435292894080. Its totient is φ = 71243773440.

The previous prime is 215688451001. The next prime is 215688451009. The reversal of 215688451002 is 200154886512.

It is not an unprimeable number, because it can be changed into a prime (215688451001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3172627 + ... + 3239897.

It is an arithmetic number, because the mean of its divisors is an integer number (13602902940).

Almost surely, 2^215688451002 is an apocalyptic number.

215688451002 is an abundant number, since it is smaller than the sum of its proper divisors (219604443078).

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

215688451002 is a wasteful number, since it uses less digits than its factorization.

215688451002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72118.

The product of its (nonzero) digits is 153600, while the sum is 42.

The spelling of 215688451002 in words is "two hundred fifteen billion, six hundred eighty-eight million, four hundred fifty-one thousand, two".