215401553260 has 24 divisors (see below), whose sum is σ = 458069129280. Its totient is φ = 85069979904.

The previous prime is 215401553239. The next prime is 215401553299. The reversal of 215401553260 is 62355104512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68163469 + ... + 68166628.

It is an arithmetic number, because the mean of its divisors is an integer number (19086213720).

Almost surely, 2^215401553260 is an apocalyptic number.

215401553260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215401553260 is an abundant number, since it is smaller than the sum of its proper divisors (242667576020).

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

215401553260 is a wasteful number, since it uses less digits than its factorization.

215401553260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136330185 (or 136330183 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 215401553260 its reverse (62355104512), we get a palindrome (277756657772).

The spelling of 215401553260 in words is "two hundred fifteen billion, four hundred one million, five hundred fifty-three thousand, two hundred sixty".