215408163951 has 6 divisors (see below), whose sum is σ = 311145125720. Its totient is φ = 143605442628.

The previous prime is 215408163931. The next prime is 215408163959. The reversal of 215408163951 is 159361804512.

It is a happy number.

215408163951 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 0 + 8 + 1 + 639 + 5 + 1 = 666.

It is not a de Polignac number, because 215408163951 - 2⁷ = 215408163823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215408163897 and 215408163906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215408163959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11967120211 + ... + 11967120228.

Almost surely, 2^215408163951 is an apocalyptic number.

215408163951 is a deficient number, since it is larger than the sum of its proper divisors (95736961769).

215408163951 is a wasteful number, since it uses less digits than its factorization.

215408163951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23934240445 (or 23934240442 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 215408163951 in words is "two hundred fifteen billion, four hundred eight million, one hundred sixty-three thousand, nine hundred fifty-one".