215436023 has 6 divisors (see below), whose sum is σ = 236801712. Its totient is φ = 195850820.

The previous prime is 215435999. The next prime is 215436059. The reversal of 215436023 is 320634512.

It is not a de Polignac number, because 215436023 - 2⁸ = 215435767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215435983 and 215436001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215436073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 890111 + ... + 890352.

It is an arithmetic number, because the mean of its divisors is an integer number (39466952).

Almost surely, 2^215436023 is an apocalyptic number.

215436023 is a deficient number, since it is larger than the sum of its proper divisors (21365689).

215436023 is a wasteful number, since it uses less digits than its factorization.

215436023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780485 (or 1780474 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 215436023 is about 14677.7390288832. The cubic root of 215436023 is about 599.4773439240.

The spelling of 215436023 in words is "two hundred fifteen million, four hundred thirty-six thousand, twenty-three".