402266551 has 2 divisors, whose sum is σ = 402266552. Its totient is φ = 402266550.

The previous prime is 402266549. The next prime is 402266611. The reversal of 402266551 is 155662204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402266551 - 2¹ = 402266549 is a prime.

Together with 402266549, it forms a pair of twin primes.

It is equal to p_21450667 and since 402266551 and 21450667 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402266951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201133275 + 201133276.

It is an arithmetic number, because the mean of its divisors is an integer number (201133276).

Almost surely, 2^402266551 is an apocalyptic number.

402266551 is a deficient number, since it is larger than the sum of its proper divisors (1).

402266551 is an equidigital number, since it uses as much as digits as its factorization.

402266551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 402266551 is about 20056.5837320317. The cubic root of 402266551 is about 738.1953536008.

The spelling of 402266551 in words is "four hundred two million, two hundred sixty-six thousand, five hundred fifty-one".