2135271731 has 2 divisors, whose sum is σ = 2135271732. Its totient is φ = 2135271730.

The previous prime is 2135271647. The next prime is 2135271829. The reversal of 2135271731 is 1371725312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2135271731 - 2²² = 2131077427 is a prime.

It is a super-2 number, since 2×2135271731² = 9118770730415472722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2135271331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067635865 + 1067635866.

It is an arithmetic number, because the mean of its divisors is an integer number (1067635866).

Almost surely, 2^2135271731 is an apocalyptic number.

2135271731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135271731 is an equidigital number, since it uses as much as digits as its factorization.

2135271731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 2135271731 is about 46209.0005410201. Note that the first 3 decimals coincide. The cubic root of 2135271731 is about 1287.7089577712.

The spelling of 2135271731 in words is "two billion, one hundred thirty-five million, two hundred seventy-one thousand, seven hundred thirty-one".