402155215247 has 2 divisors, whose sum is σ = 402155215248. Its totient is φ = 402155215246.

The previous prime is 402155215229. The next prime is 402155215289. The reversal of 402155215247 is 742512551204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402155215247 - 2⁸ = 402155214991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402155215247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402155215547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201077607623 + 201077607624.

It is an arithmetic number, because the mean of its divisors is an integer number (201077607624).

Almost surely, 2^402155215247 is an apocalyptic number.

402155215247 is a deficient number, since it is larger than the sum of its proper divisors (1).

402155215247 is an equidigital number, since it uses as much as digits as its factorization.

402155215247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112000, while the sum is 38.

The spelling of 402155215247 in words is "four hundred two billion, one hundred fifty-five million, two hundred fifteen thousand, two hundred forty-seven".