215112157 has 12 divisors (see below), whose sum is σ = 233445780. Its totient is φ = 198127488.

The previous prime is 215112133. The next prime is 215112173. The reversal of 215112157 is 751211512.

It can be written as a sum of positive squares in 6 ways, for example, as 35176761 + 179935396 = 5931^2 + 13414^2 .

It is not a de Polignac number, because 215112157 - 2¹¹ = 215110109 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 (215122157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95043 + ... + 97279.

It is an arithmetic number, because the mean of its divisors is an integer number (19453815).

Almost surely, 2^215112157 is an apocalyptic number.

It is an amenable number.

215112157 is a deficient number, since it is larger than the sum of its proper divisors (18333623).

215112157 is a wasteful number, since it uses less digits than its factorization.

215112157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832 (or 2819 counting only the distinct ones).

The product of its digits is 700, while the sum is 25.

The square root of 215112157 is about 14666.7023219264. The cubic root of 215112157 is about 599.1767942184.

Adding to 215112157 its reverse (751211512), we get a palindrome (966323669).

The spelling of 215112157 in words is "two hundred fifteen million, one hundred twelve thousand, one hundred fifty-seven".