215720887452 has 96 divisors (see below), whose sum is σ = 597453373440. Its totient is φ = 59300675520.

The previous prime is 215720887441. The next prime is 215720887457. The reversal of 215720887452 is 254788027512.

It is a junction number, because it is equal to n+sod(n) for n = 215720887395 and 215720887404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215720887457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230124 + ... + 695987.

It is an arithmetic number, because the mean of its divisors is an integer number (6223472640).

Almost surely, 2^215720887452 is an apocalyptic number.

It is an amenable number.

215720887452 is an abundant number, since it is smaller than the sum of its proper divisors (381732485988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215720887452 is a wasteful number, since it uses less digits than its factorization.

215720887452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926231 (or 926229 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 51.

The spelling of 215720887452 in words is "two hundred fifteen billion, seven hundred twenty million, eight hundred eighty-seven thousand, four hundred fifty-two".