215088623 has 12 divisors (see below), whose sum is σ = 223934328. Its totient is φ = 206534160.

The previous prime is 215088589. The next prime is 215088631. The reversal of 215088623 is 326880512.

It is a de Polignac number, because none of the positive numbers 2^k-215088623 is a prime.

It is a super-2 number, since 2×215088623² = 92526231488072258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215081623) 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, 111836 + ... + 113742.

It is an arithmetic number, because the mean of its divisors is an integer number (18661194).

Almost surely, 2^215088623 is an apocalyptic number.

215088623 is a deficient number, since it is larger than the sum of its proper divisors (8845705).

215088623 is an equidigital number, since it uses as much as digits as its factorization.

215088623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2011 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 215088623 is about 14665.9000064776. The cubic root of 215088623 is about 599.1549427633.

The spelling of 215088623 in words is "two hundred fifteen million, eighty-eight thousand, six hundred twenty-three".