402155215379 has 2 divisors, whose sum is σ = 402155215380. Its totient is φ = 402155215378.

The previous prime is 402155215307. The next prime is 402155215381. The reversal of 402155215379 is 973512551204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402155215379 is a prime.

It is a super-2 number, since 2×402155215379² (a number of 24 digits) contains 22 as substring.

Together with 402155215381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402155217379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201077607689 + 201077607690.

It is an arithmetic number, because the mean of its divisors is an integer number (201077607690).

Almost surely, 2^402155215379 is an apocalyptic number.

402155215379 is a deficient number, since it is larger than the sum of its proper divisors (1).

402155215379 is an equidigital number, since it uses as much as digits as its factorization.

402155215379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 402155215379 in words is "four hundred two billion, one hundred fifty-five million, two hundred fifteen thousand, three hundred seventy-nine".