215313723 has 6 divisors (see below), whose sum is σ = 311008724. Its totient is φ = 143542476.

The previous prime is 215313689. The next prime is 215313733. The reversal of 215313723 is 327313512.

It is not a de Polignac number, because 215313723 - 2²¹ = 213216571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215313733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11961865 + ... + 11961882.

Almost surely, 2^215313723 is an apocalyptic number.

215313723 is a deficient number, since it is larger than the sum of its proper divisors (95695001).

215313723 is a wasteful number, since it uses less digits than its factorization.

215313723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23923753 (or 23923750 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 215313723 is about 14673.5722644488. The cubic root of 215313723 is about 599.3638841661.

It can be divided in two parts, 2153 and 13723, that added together give a square (15876 = 126²).

The spelling of 215313723 in words is "two hundred fifteen million, three hundred thirteen thousand, seven hundred twenty-three".