215077903157 has 4 divisors (see below), whose sum is σ = 231622357260. Its totient is φ = 198533449056.

The previous prime is 215077903147. The next prime is 215077903181. The reversal of 215077903157 is 751309770512.

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 47415498001 + 167662405156 = 217751^2 + 409466^2 .

It is a cyclic number.

It is not a de Polignac number, because 215077903157 - 2¹⁸ = 215077641013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215077903147) 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, 8272227032 + ... + 8272227057.

It is an arithmetic number, because the mean of its divisors is an integer number (57905589315).

Almost surely, 2^215077903157 is an apocalyptic number.

It is an amenable number.

215077903157 is a deficient number, since it is larger than the sum of its proper divisors (16544454103).

215077903157 is a wasteful number, since it uses less digits than its factorization.

215077903157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544454102.

The product of its (nonzero) digits is 463050, while the sum is 47.

The spelling of 215077903157 in words is "two hundred fifteen billion, seventy-seven million, nine hundred three thousand, one hundred fifty-seven".