215102420 has 48 divisors (see below), whose sum is σ = 512077440. Its totient is φ = 75240576.

The previous prime is 215102413. The next prime is 215102431. The reversal of 215102420 is 24201512.

215102420 is digitally balanced in base 2, 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 15 ways as a sum of consecutive naturals, for example, 16832 + ... + 26711.

It is an arithmetic number, because the mean of its divisors is an integer number (10668280).

Almost surely, 2^215102420 is an apocalyptic number.

215102420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215102420 is an abundant number, since it is smaller than the sum of its proper divisors (296975020).

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

215102420 is a wasteful number, since it uses less digits than its factorization.

215102420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43584 (or 43582 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 215102420 is about 14666.3703757951. The cubic root of 215102420 is about 599.1677535509.

Adding to 215102420 its reverse (24201512), we get a palindrome (239303932).

The spelling of 215102420 in words is "two hundred fifteen million, one hundred two thousand, four hundred twenty".