115212540 has 48 divisors (see below), whose sum is σ = 325469088. Its totient is φ = 30449664.

The previous prime is 115212533. The next prime is 115212569. The reversal of 115212540 is 45212511.

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, 1717 + ... + 15276.

It is an arithmetic number, because the mean of its divisors is an integer number (6780606).

Almost surely, 2^115212540 is an apocalyptic number.

115212540 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 115212540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162734544).

115212540 is an abundant number, since it is smaller than the sum of its proper divisors (210256548).

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

115212540 is a wasteful number, since it uses less digits than its factorization.

115212540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17118 (or 17116 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 115212540 is about 10733.7104488616. The cubic root of 115212540 is about 486.5938142861.

The spelling of 115212540 in words is "one hundred fifteen million, two hundred twelve thousand, five hundred forty".