215236341551 has 12 divisors (see below), whose sum is σ = 273138512040. Its totient is φ = 167716629360.

The previous prime is 215236341499. The next prime is 215236341581. The reversal of 215236341551 is 155143632512.

It is a de Polignac number, because none of the positive numbers 2^k-215236341551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215236341581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199662116 + ... + 199663193.

It is an arithmetic number, because the mean of its divisors is an integer number (22761542670).

Almost surely, 2^215236341551 is an apocalyptic number.

215236341551 is a deficient number, since it is larger than the sum of its proper divisors (57902170489).

215236341551 is a wasteful number, since it uses less digits than its factorization.

215236341551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399325334 (or 399325327 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The spelling of 215236341551 in words is "two hundred fifteen billion, two hundred thirty-six million, three hundred forty-one thousand, five hundred fifty-one".