131400240 has 40 divisors (see below), whose sum is σ = 407341488. Its totient is φ = 35040000.

The previous prime is 131400239. The next prime is 131400253. The reversal of 131400240 is 42004131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273511 + ... + 273990.

Almost surely, 2^131400240 is an apocalyptic number.

131400240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131400240 is an abundant number, since it is smaller than the sum of its proper divisors (275941248).

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

131400240 is a wasteful number, since it uses less digits than its factorization.

131400240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547517 (or 547511 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 131400240 is about 11462.9943731994. The cubic root of 131400240 is about 508.3920135311.

Adding to 131400240 its reverse (42004131), we get a palindrome (173404371).

The spelling of 131400240 in words is "one hundred thirty-one million, four hundred thousand, two hundred forty".