135131951 has 2 divisors, whose sum is σ = 135131952. Its totient is φ = 135131950.

The previous prime is 135131921. The next prime is 135131959. The reversal of 135131951 is 159131531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135131951 - 2¹⁰ = 135130927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135131959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67565975 + 67565976.

It is an arithmetic number, because the mean of its divisors is an integer number (67565976).

Almost surely, 2^135131951 is an apocalyptic number.

135131951 is a deficient number, since it is larger than the sum of its proper divisors (1).

135131951 is an equidigital number, since it uses as much as digits as its factorization.

135131951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2025, while the sum is 29.

The square root of 135131951 is about 11624.6269187445. The cubic root of 135131951 is about 513.1598651613.

The spelling of 135131951 in words is "one hundred thirty-five million, one hundred thirty-one thousand, nine hundred fifty-one".