131131623450 has 48 divisors (see below), whose sum is σ = 326639138400. Its totient is φ = 34814377920.

The previous prime is 131131623443. The next prime is 131131623461. The reversal of 131131623450 is 54326131131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1891525 + ... + 1959624.

It is an arithmetic number, because the mean of its divisors is an integer number (6804982050).

Almost surely, 2^131131623450 is an apocalyptic number.

131131623450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131131623450 is an abundant number, since it is smaller than the sum of its proper divisors (195507514950).

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

131131623450 is a wasteful number, since it uses less digits than its factorization.

131131623450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851391 (or 3851386 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 131131623450 its reverse (54326131131), we get a palindrome (185457754581).

The spelling of 131131623450 in words is "one hundred thirty-one billion, one hundred thirty-one million, six hundred twenty-three thousand, four hundred fifty".