131321104450 has 24 divisors (see below), whose sum is σ = 258625329732. Its totient is φ = 49438533120.

The previous prime is 131321104417. The next prime is 131321104457. The reversal of 131321104450 is 54401123131.

It can be written as a sum of positive squares in 6 ways, for example, as 111702339961 + 19618764489 = 334219^2 + 140067^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (131321104457) 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, 77246859 + ... + 77248558.

Almost surely, 2^131321104450 is an apocalyptic number.

131321104450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131321104450 is a deficient number, since it is larger than the sum of its proper divisors (127304225282).

131321104450 is a wasteful number, since it uses less digits than its factorization.

131321104450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154495446 (or 154495441 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 131321104450 its reverse (54401123131), we get a palindrome (185722227581).

The spelling of 131321104450 in words is "one hundred thirty-one billion, three hundred twenty-one million, one hundred four thousand, four hundred fifty".