215421421552 has 20 divisors (see below), whose sum is σ = 417424898176. Its totient is φ = 107698867200.

The previous prime is 215421421531. The next prime is 215421421603. The reversal of 215421421552 is 255124124512.

215421421552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589233 + ... + 882064.

Almost surely, 2^215421421552 is an apocalyptic number.

It is an amenable number.

215421421552 is a deficient number, since it is larger than the sum of its proper divisors (202003476624).

215421421552 is a wasteful number, since it uses less digits than its factorization.

215421421552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480456 (or 1480450 counting only the distinct ones).

The product of its digits is 32000, while the sum is 34.

The spelling of 215421421552 in words is "two hundred fifteen billion, four hundred twenty-one million, four hundred twenty-one thousand, five hundred fifty-two".