215225531113 has 4 divisors (see below), whose sum is σ = 217200077380. Its totient is φ = 213250984848.

The previous prime is 215225531107. The next prime is 215225531123. The reversal of 215225531113 is 311135522512.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144892899904 + 70332631209 = 380648^2 + 265203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215225531113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215225531123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987272970 + ... + 987273187.

It is an arithmetic number, because the mean of its divisors is an integer number (54300019345).

Almost surely, 2^215225531113 is an apocalyptic number.

It is an amenable number.

215225531113 is a deficient number, since it is larger than the sum of its proper divisors (1974546267).

215225531113 is a wasteful number, since it uses less digits than its factorization.

215225531113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974546266.

The product of its digits is 9000, while the sum is 31.

The spelling of 215225531113 in words is "two hundred fifteen billion, two hundred twenty-five million, five hundred thirty-one thousand, one hundred thirteen".