215023014421 has 16 divisors (see below), whose sum is σ = 239680546560. Its totient is φ = 191702177280.

The previous prime is 215023014413. The next prime is 215023014443. The reversal of 215023014421 is 124410320512.

It is a cyclic number.

It is not a de Polignac number, because 215023014421 - 2³ = 215023014413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215023014461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3394681 + ... + 3457441.

It is an arithmetic number, because the mean of its divisors is an integer number (14980034160).

Almost surely, 2^215023014421 is an apocalyptic number.

It is an amenable number.

215023014421 is a deficient number, since it is larger than the sum of its proper divisors (24657532139).

215023014421 is a wasteful number, since it uses less digits than its factorization.

215023014421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73404.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 215023014421 its reverse (124410320512), we get a palindrome (339433334933).

The spelling of 215023014421 in words is "two hundred fifteen billion, twenty-three million, fourteen thousand, four hundred twenty-one".