131227420640 has 48 divisors (see below), whose sum is σ = 317234676528. Its totient is φ = 51270245376.

The previous prime is 131227420619. The next prime is 131227420661. The reversal of 131227420640 is 46024722131.

It is an interprime number because it is at equal distance from previous prime (131227420619) and next prime (131227420661).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 131227420597 and 131227420606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9529997 + ... + 9543756.

It is an arithmetic number, because the mean of its divisors is an integer number (6609055761).

Almost surely, 2^131227420640 is an apocalyptic number.

131227420640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131227420640 is an abundant number, since it is smaller than the sum of its proper divisors (186007255888).

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

131227420640 is a wasteful number, since it uses less digits than its factorization.

131227420640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19073811 (or 19073803 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 131227420640 in words is "one hundred thirty-one billion, two hundred twenty-seven million, four hundred twenty thousand, six hundred forty".