131153440 has 96 divisors (see below), whose sum is σ = 346078656. Its totient is φ = 46556160.

The previous prime is 131153437. The next prime is 131153441. The reversal of 131153440 is 44351131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (131153441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74814 + ... + 76546.

It is an arithmetic number, because the mean of its divisors is an integer number (3604986).

Almost surely, 2^131153440 is an apocalyptic number.

131153440 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 131153440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173039328).

131153440 is an abundant number, since it is smaller than the sum of its proper divisors (214925216).

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

131153440 is a wasteful number, since it uses less digits than its factorization.

131153440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131153440 is about 11452.2242381120. The cubic root of 131153440 is about 508.0735215060.

The spelling of 131153440 in words is "one hundred thirty-one million, one hundred fifty-three thousand, four hundred forty".