2115031220 has 24 divisors (see below), whose sum is σ = 4442500608. Its totient is φ = 845834400.

The previous prime is 2115031201. The next prime is 2115031231. The reversal of 2115031220 is 221305112.

It is a happy number.

It is a congruent number.

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, 129725 + ... + 145115.

It is an arithmetic number, because the mean of its divisors is an integer number (185104192).

Almost surely, 2^2115031220 is an apocalyptic number.

2115031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115031220 is an abundant number, since it is smaller than the sum of its proper divisors (2327469388).

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

2115031220 is a wasteful number, since it uses less digits than its factorization.

2115031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22271 (or 22269 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2115031220 is about 45989.4685770558. The cubic root of 2115031220 is about 1283.6272480613.

Adding to 2115031220 its reverse (221305112), we get a palindrome (2336336332).

The spelling of 2115031220 in words is "two billion, one hundred fifteen million, thirty-one thousand, two hundred twenty".