215415251042 has 4 divisors (see below), whose sum is σ = 323122876566. Its totient is φ = 107707625520.

The previous prime is 215415250913. The next prime is 215415251053. The reversal of 215415251042 is 240152514512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 206260397281 + 9154853761 = 454159^2 + 95681^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53853812759 + ... + 53853812762.

Almost surely, 2^215415251042 is an apocalyptic number.

215415251042 is a deficient number, since it is larger than the sum of its proper divisors (107707625524).

215415251042 is a wasteful number, since it uses less digits than its factorization.

215415251042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107707625523.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 215415251042 its reverse (240152514512), we get a palindrome (455567765554).

The spelling of 215415251042 in words is "two hundred fifteen billion, four hundred fifteen million, two hundred fifty-one thousand, forty-two".