2102345731 has 2 divisors, whose sum is σ = 2102345732. Its totient is φ = 2102345730.

The previous prime is 2102345701. The next prime is 2102345789. The reversal of 2102345731 is 1375432012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102345731 - 2²⁷ = 1968128003 is a prime.

It is a super-2 number, since 2×2102345731² = 8839715145307848722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102345731.

It is not a weakly prime, because it can be changed into another prime (2102345701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051172865 + 1051172866.

It is an arithmetic number, because the mean of its divisors is an integer number (1051172866).

Almost surely, 2^2102345731 is an apocalyptic number.

2102345731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102345731 is an equidigital number, since it uses as much as digits as its factorization.

2102345731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2102345731 is about 45851.3438298159. The cubic root of 2102345731 is about 1281.0557961739.

Adding to 2102345731 its reverse (1375432012), we get a palindrome (3477777743).

The spelling of 2102345731 in words is "two billion, one hundred two million, three hundred forty-five thousand, seven hundred thirty-one".