215256566054 has 4 divisors (see below), whose sum is σ = 322884849084. Its totient is φ = 107628283026.

The previous prime is 215256566053. The next prime is 215256566087. The reversal of 215256566054 is 450665652512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215256566053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53814141512 + ... + 53814141515.

It is an arithmetic number, because the mean of its divisors is an integer number (80721212271).

Almost surely, 2^215256566054 is an apocalyptic number.

215256566054 is a deficient number, since it is larger than the sum of its proper divisors (107628283030).

215256566054 is a wasteful number, since it uses less digits than its factorization.

215256566054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107628283029.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 215256566054 in words is "two hundred fifteen billion, two hundred fifty-six million, five hundred sixty-six thousand, fifty-four".