215231743503 has 12 divisors (see below), whose sum is σ = 355303195728. Its totient is φ = 122989567680.

The previous prime is 215231743499. The next prime is 215231743523. The reversal of 215231743503 is 305347132512.

215231743503 is a `hidden beast` number, since 2 + 1 + 5 + 231 + 74 + 350 + 3 = 666.

It is not a de Polignac number, because 215231743503 - 2² = 215231743499 is a prime.

It is a super-2 number, since 2×215231743503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215231743523) 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, 1708188378 + ... + 1708188503.

It is an arithmetic number, because the mean of its divisors is an integer number (29608599644).

Almost surely, 2^215231743503 is an apocalyptic number.

215231743503 is a deficient number, since it is larger than the sum of its proper divisors (140071452225).

215231743503 is a wasteful number, since it uses less digits than its factorization.

215231743503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416376894 (or 3416376891 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The spelling of 215231743503 in words is "two hundred fifteen billion, two hundred thirty-one million, seven hundred forty-three thousand, five hundred three".