215015131420 has 24 divisors (see below), whose sum is σ = 458933938848. Its totient is φ = 84596116800.

The previous prime is 215015131367. The next prime is 215015131423. The reversal of 215015131420 is 24131510512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215015131423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88119736 + ... + 88122175.

It is an arithmetic number, because the mean of its divisors is an integer number (19122247452).

Almost surely, 2^215015131420 is an apocalyptic number.

215015131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215015131420 is an abundant number, since it is smaller than the sum of its proper divisors (243918807428).

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

215015131420 is a wasteful number, since it uses less digits than its factorization.

215015131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176241981 (or 176241979 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 215015131420 its reverse (24131510512), we get a palindrome (239146641932).

The spelling of 215015131420 in words is "two hundred fifteen billion, fifteen million, one hundred thirty-one thousand, four hundred twenty".