115315540 has 24 divisors (see below), whose sum is σ = 244663272. Its totient is φ = 45649920.

The previous prime is 115315517. The next prime is 115315631. The reversal of 115315540 is 45513511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 311364 + 115004176 = 558^2 + 10724^2 .

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, 27781 + ... + 31660.

It is an arithmetic number, because the mean of its divisors is an integer number (10194303).

Almost surely, 2^115315540 is an apocalyptic number.

115315540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115315540 is an abundant number, since it is smaller than the sum of its proper divisors (129347732).

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

115315540 is a wasteful number, since it uses less digits than its factorization.

115315540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59547 (or 59545 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 115315540 is about 10738.5073450643. The cubic root of 115315540 is about 486.7387760376.

It can be divided in two parts, 11531 and 5540, that added together give a palindrome (17071).

The spelling of 115315540 in words is "one hundred fifteen million, three hundred fifteen thousand, five hundred forty".