402144305831 has 2 divisors, whose sum is σ = 402144305832. Its totient is φ = 402144305830.

The previous prime is 402144305807. The next prime is 402144305833. The reversal of 402144305831 is 138503441204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402144305831 - 2⁶ = 402144305767 is a prime.

It is a super-2 number, since 2×402144305831² (a number of 24 digits) contains 22 as substring.

Together with 402144305833, 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 = 402144305791 and 402144305800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144305833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072152915 + 201072152916.

It is an arithmetic number, because the mean of its divisors is an integer number (201072152916).

Almost surely, 2^402144305831 is an apocalyptic number.

402144305831 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144305831 is an equidigital number, since it uses as much as digits as its factorization.

402144305831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 402144305831 in words is "four hundred two billion, one hundred forty-four million, three hundred five thousand, eight hundred thirty-one".