115122220 has 24 divisors (see below), whose sum is σ = 249556608. Its totient is φ = 44563200.

The previous prime is 115122209. The next prime is 115122221. The reversal of 115122220 is 22221511.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 115122194 and 115122203.

It is not an unprimeable number, because it can be changed into a prime (115122221) 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, 92221 + ... + 93460.

It is an arithmetic number, because the mean of its divisors is an integer number (10398192).

Almost surely, 2^115122220 is an apocalyptic number.

115122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115122220 is an abundant number, since it is smaller than the sum of its proper divisors (134434388).

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

115122220 is a wasteful number, since it uses less digits than its factorization.

115122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185721 (or 185719 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 115122220 is about 10729.5023183743. The cubic root of 115122220 is about 486.4666271968.

Adding to 115122220 its reverse (22221511), we get a palindrome (137343731).

It can be divided in two parts, 11 and 5122220, that multiplied together give a triangular number (56344420 = T₁₀₆₁₅).

The spelling of 115122220 in words is "one hundred fifteen million, one hundred twenty-two thousand, two hundred twenty".