215022305561551 has 16 divisors (see below), whose sum is σ = 221008322727360. Its totient is φ = 209072234004480.

The previous prime is 215022305561549. The next prime is 215022305561629. The reversal of 215022305561551 is 155165503220512.

215022305561551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 215022305561551 - 2¹ = 215022305561549 is a prime.

It is a super-2 number, since 2×215022305561551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215022305561498 and 215022305561507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215022305561051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23241391 + ... + 31148143.

It is an arithmetic number, because the mean of its divisors is an integer number (13813020170460).

Almost surely, 2^{215022305561551} is an apocalyptic number.

215022305561551 is a deficient number, since it is larger than the sum of its proper divisors (5986017165809).

215022305561551 is a wasteful number, since it uses less digits than its factorization.

215022305561551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909026.

The product of its (nonzero) digits is 450000, while the sum is 43.

The spelling of 215022305561551 in words is "two hundred fifteen trillion, twenty-two billion, three hundred five million, five hundred sixty-one thousand, five hundred fifty-one".