402155215289 has 2 divisors, whose sum is σ = 402155215290. Its totient is φ = 402155215288.

The previous prime is 402155215247. The next prime is 402155215291. The reversal of 402155215289 is 982512551204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401332386064 + 822829225 = 633508^2 + 28685^2 .

It is a cyclic number.

It is not a de Polignac number, because 402155215289 - 2³⁶ = 333435738553 is a prime.

It is a Sophie Germain prime.

Together with 402155215291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (402155215229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201077607644 + 201077607645.

It is an arithmetic number, because the mean of its divisors is an integer number (201077607645).

Almost surely, 2^402155215289 is an apocalyptic number.

It is an amenable number.

402155215289 is a deficient number, since it is larger than the sum of its proper divisors (1).

402155215289 is an equidigital number, since it uses as much as digits as its factorization.

402155215289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 402155215289 in words is "four hundred two billion, one hundred fifty-five million, two hundred fifteen thousand, two hundred eighty-nine".