131631455 has 4 divisors (see below), whose sum is σ = 157957752. Its totient is φ = 105305160.

The previous prime is 131631433. The next prime is 131631457. The reversal of 131631455 is 554136131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554136131 = 17 ⋅32596243.

It is not a de Polignac number, because 131631455 - 2¹⁰ = 131630431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131631457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13163141 + ... + 13163150.

It is an arithmetic number, because the mean of its divisors is an integer number (39489438).

Almost surely, 2^131631455 is an apocalyptic number.

131631455 is a deficient number, since it is larger than the sum of its proper divisors (26326297).

131631455 is an equidigital number, since it uses as much as digits as its factorization.

131631455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26326296.

The product of its digits is 5400, while the sum is 29.

The square root of 131631455 is about 11473.0752198354. The cubic root of 131631455 is about 508.6900317084.

Adding to 131631455 its reverse (554136131), we get a palindrome (685767586).

The spelling of 131631455 in words is "one hundred thirty-one million, six hundred thirty-one thousand, four hundred fifty-five".