115221040 has 60 divisors (see below), whose sum is σ = 294481152. Its totient is φ = 41895040.

The previous prime is 115221023. The next prime is 115221049. The reversal of 115221040 is 40122511.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (115221049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3729 + ... + 15631.

Almost surely, 2^115221040 is an apocalyptic number.

115221040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147240576).

115221040 is an abundant number, since it is smaller than the sum of its proper divisors (179260112).

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

115221040 is a wasteful number, since it uses less digits than its factorization.

115221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11938 (or 11921 counting only the distinct ones).

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

The square root of 115221040 is about 10734.1063903802. The cubic root of 115221040 is about 486.6057804190.

Adding to 115221040 its reverse (40122511), we get a palindrome (155343551).

The spelling of 115221040 in words is "one hundred fifteen million, two hundred twenty-one thousand, forty".