131451245540 has 48 divisors (see below), whose sum is σ = 288116060400. Its totient is φ = 50330142720.

The previous prime is 131451245539. The next prime is 131451245551. The reversal of 131451245540 is 45542154131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1832524864 + 129618720676 = 42808^2 + 360026^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131451245540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1468865 + ... + 1555784.

It is an arithmetic number, because the mean of its divisors is an integer number (6002417925).

Almost surely, 2^131451245540 is an apocalyptic number.

131451245540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131451245540 is an abundant number, since it is smaller than the sum of its proper divisors (156664814860).

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

131451245540 is a wasteful number, since it uses less digits than its factorization.

131451245540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024752 (or 3024750 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 131451245540 its reverse (45542154131), we get a palindrome (176993399671).

The spelling of 131451245540 in words is "one hundred thirty-one billion, four hundred fifty-one million, two hundred forty-five thousand, five hundred forty".