131428631 has 2 divisors, whose sum is σ = 131428632. Its totient is φ = 131428630.

The previous prime is 131428589. The next prime is 131428637. The reversal of 131428631 is 136824131.

It is a strong prime.

It is an emirp because it is prime and its reverse (136824131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131428631 - 2¹⁴ = 131412247 is a prime.

It is a super-2 number, since 2×131428631² = 34546970093068322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131428594 and 131428603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131428637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65714315 + 65714316.

It is an arithmetic number, because the mean of its divisors is an integer number (65714316).

Almost surely, 2^131428631 is an apocalyptic number.

131428631 is a deficient number, since it is larger than the sum of its proper divisors (1).

131428631 is an equidigital number, since it uses as much as digits as its factorization.

131428631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 131428631 is about 11464.2326825654. The cubic root of 131428631 is about 508.4286261437.

The spelling of 131428631 in words is "one hundred thirty-one million, four hundred twenty-eight thousand, six hundred thirty-one".