20212515535223 has 48 divisors (see below), whose sum is σ = 23371950760704. Its totient is φ = 17333006296320.

The previous prime is 20212515535213. The next prime is 20212515535253. The reversal of 20212515535223 is 32253551521202.

It is a de Polignac number, because none of the positive numbers 2^k-20212515535223 is a prime.

It is a super-2 number, since 2×20212515535223² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212515535213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1001750111 + ... + 1001770287.

It is an arithmetic number, because the mean of its divisors is an integer number (486915640848).

Almost surely, 2^{20212515535223} is an apocalyptic number.

20212515535223 is a deficient number, since it is larger than the sum of its proper divisors (3159435225481).

20212515535223 is a wasteful number, since it uses less digits than its factorization.

20212515535223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21300 (or 21281 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 20212515535223 in words is "twenty trillion, two hundred twelve billion, five hundred fifteen million, five hundred thirty-five thousand, two hundred twenty-three".