131871553461 has 12 divisors (see below), whose sum is σ = 190711471392. Its totient is φ = 87808058856.

The previous prime is 131871553453. The next prime is 131871553481. The reversal of 131871553461 is 164355178131.

131871553461 is a `hidden beast` number, since 1 + 3 + 187 + 1 + 5 + 5 + 3 + 461 = 666.

It is not a de Polignac number, because 131871553461 - 2³ = 131871553453 is a prime.

It is a super-2 number, since 2×131871553461² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131871553421) 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, 8851321 + ... + 8866206.

It is an arithmetic number, because the mean of its divisors is an integer number (15892622616).

Almost surely, 2^131871553461 is an apocalyptic number.

It is an amenable number.

131871553461 is a deficient number, since it is larger than the sum of its proper divisors (58839917931).

131871553461 is a wasteful number, since it uses less digits than its factorization.

131871553461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17718360 (or 17718357 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 131871553461 in words is "one hundred thirty-one billion, eight hundred seventy-one million, five hundred fifty-three thousand, four hundred sixty-one".