115221550 has 24 divisors (see below), whose sum is σ = 215189352. Its totient is φ = 45900000.

The previous prime is 115221539. The next prime is 115221593. The reversal of 115221550 is 55122511.

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 11 ways as a sum of consecutive naturals, for example, 7960 + ... + 17140.

It is an arithmetic number, because the mean of its divisors is an integer number (8966223).

Almost surely, 2^115221550 is an apocalyptic number.

115221550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115221550 is a deficient number, since it is larger than the sum of its proper divisors (99967802).

115221550 is a wasteful number, since it uses less digits than its factorization.

115221550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9444 (or 9439 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 115221550 is about 10734.1301464068. The cubic root of 115221550 is about 486.6064983683.

The spelling of 115221550 in words is "one hundred fifteen million, two hundred twenty-one thousand, five hundred fifty".