131499451 has 2 divisors, whose sum is σ = 131499452. Its totient is φ = 131499450.

The previous prime is 131499449. The next prime is 131499457. The reversal of 131499451 is 154994131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131499451 - 2¹ = 131499449 is a prime.

It is a super-2 number, since 2×131499451² = 34584211226602802, which contains 22 as substring.

Together with 131499449, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 131499451.

It is not a weakly prime, because it can be changed into another prime (131499457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65749725 + 65749726.

It is an arithmetic number, because the mean of its divisors is an integer number (65749726).

Almost surely, 2^131499451 is an apocalyptic number.

131499451 is a deficient number, since it is larger than the sum of its proper divisors (1).

131499451 is an equidigital number, since it uses as much as digits as its factorization.

131499451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 131499451 is about 11467.3210036172. The cubic root of 131499451 is about 508.5199315910.

The spelling of 131499451 in words is "one hundred thirty-one million, four hundred ninety-nine thousand, four hundred fifty-one".