135145731 has 16 divisors (see below), whose sum is σ = 208839168. Its totient is φ = 76137600.

The previous prime is 135145639. The next prime is 135145739. The reversal of 135145731 is 137541531.

It is not a de Polignac number, because 135145731 - 2¹⁵ = 135112963 is a prime.

It is a super-2 number, since 2×135145731² = 36528737215048722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135145739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43830 + ... + 46811.

It is an arithmetic number, because the mean of its divisors is an integer number (13052448).

Almost surely, 2^135145731 is an apocalyptic number.

135145731 is a deficient number, since it is larger than the sum of its proper divisors (73693437).

135145731 is an equidigital number, since it uses as much as digits as its factorization.

135145731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90722.

The product of its digits is 6300, while the sum is 30.

The square root of 135145731 is about 11625.2196108289. The cubic root of 135145731 is about 513.1773076253.

The spelling of 135145731 in words is "one hundred thirty-five million, one hundred forty-five thousand, seven hundred thirty-one".