345640252031 has 2 divisors, whose sum is σ = 345640252032. Its totient is φ = 345640252030.

The previous prime is 345640252007. The next prime is 345640252033. The reversal of 345640252031 is 130252046543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345640252031 is a prime.

It is a super-2 number, since 2×345640252031² (a number of 24 digits) contains 22 as substring.

Together with 345640252033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 345640251982 and 345640252000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345640252033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172820126015 + 172820126016.

It is an arithmetic number, because the mean of its divisors is an integer number (172820126016).

Almost surely, 2^345640252031 is an apocalyptic number.

345640252031 is a deficient number, since it is larger than the sum of its proper divisors (1).

345640252031 is an equidigital number, since it uses as much as digits as its factorization.

345640252031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 345640252031 its reverse (130252046543), we get a palindrome (475892298574).

The spelling of 345640252031 in words is "three hundred forty-five billion, six hundred forty million, two hundred fifty-two thousand, thirty-one".