131402400450 has 24 divisors (see below), whose sum is σ = 325877953488. Its totient is φ = 35040640080.

The previous prime is 131402400431. The next prime is 131402400457. The reversal of 131402400450 is 54004204131.

It is a self number, because there is not a number n which added to its sum of digits gives 131402400450.

It is not an unprimeable number, because it can be changed into a prime (131402400457) 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, 438007852 + ... + 438008151.

It is an arithmetic number, because the mean of its divisors is an integer number (13578248062).

Almost surely, 2^131402400450 is an apocalyptic number.

131402400450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131402400450 is an abundant number, since it is smaller than the sum of its proper divisors (194475553038).

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

131402400450 is a wasteful number, since it uses less digits than its factorization.

131402400450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876016018 (or 876016013 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 131402400450 its reverse (54004204131), we get a palindrome (185406604581).

The spelling of 131402400450 in words is "one hundred thirty-one billion, four hundred two million, four hundred thousand, four hundred fifty".