215100402402 has 16 divisors (see below), whose sum is σ = 430402897440. Its totient is φ = 71666452032.

The previous prime is 215100402359. The next prime is 215100402403. The reversal of 215100402402 is 204204001512.

It is a super-2 number, since 2×215100402402² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215100402403) 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, 8406688 + ... + 8432235.

It is an arithmetic number, because the mean of its divisors is an integer number (26900181090).

Almost surely, 2^215100402402 is an apocalyptic number.

215100402402 is an abundant number, since it is smaller than the sum of its proper divisors (215302495038).

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

215100402402 is a wasteful number, since it uses less digits than its factorization.

215100402402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841057.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 215100402402 its reverse (204204001512), we get a palindrome (419304403914).

The spelling of 215100402402 in words is "two hundred fifteen billion, one hundred million, four hundred two thousand, four hundred two".