215700555551 has 8 divisors (see below), whose sum is σ = 232565242560. Its totient is φ = 198874773792.

The previous prime is 215700555493. The next prime is 215700555589. The reversal of 215700555551 is 155555007512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215700555551 - 2¹⁰ = 215700554527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215700555499 and 215700555508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215700551551) 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, 9714791 + ... + 9736968.

It is an arithmetic number, because the mean of its divisors is an integer number (29070655320).

Almost surely, 2^215700555551 is an apocalyptic number.

215700555551 is a deficient number, since it is larger than the sum of its proper divisors (16864687009).

215700555551 is a wasteful number, since it uses less digits than its factorization.

215700555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19452625.

The product of its (nonzero) digits is 218750, while the sum is 41.

The spelling of 215700555551 in words is "two hundred fifteen billion, seven hundred million, five hundred fifty-five thousand, five hundred fifty-one".