115531420 has 36 divisors (see below), whose sum is σ = 250736472. Its totient is φ = 44714400.

The previous prime is 115531373. The next prime is 115531421. The reversal of 115531420 is 24135511.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 115531391 and 115531400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115531421) 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, 16215 + ... + 22225.

It is an arithmetic number, because the mean of its divisors is an integer number (6964902).

Almost surely, 2^115531420 is an apocalyptic number.

115531420 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 115531420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125368236).

115531420 is an abundant number, since it is smaller than the sum of its proper divisors (135205052).

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

115531420 is a wasteful number, since it uses less digits than its factorization.

115531420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082 (or 6049 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 115531420 is about 10748.5543213960. The cubic root of 115531420 is about 487.0423247877.

Adding to 115531420 its reverse (24135511), we get a palindrome (139666931).

The spelling of 115531420 in words is "one hundred fifteen million, five hundred thirty-one thousand, four hundred twenty".