402155543 has 2 divisors, whose sum is σ = 402155544. Its totient is φ = 402155542.

The previous prime is 402155531. The next prime is 402155563. The reversal of 402155543 is 345551204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402155543 - 2⁴ = 402155527 is a prime.

It is equal to p_21445085 and since 402155543 and 21445085 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 (402155503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201077771 + 201077772.

It is an arithmetic number, because the mean of its divisors is an integer number (201077772).

Almost surely, 2^402155543 is an apocalyptic number.

402155543 is a deficient number, since it is larger than the sum of its proper divisors (1).

402155543 is an equidigital number, since it uses as much as digits as its factorization.

402155543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 402155543 is about 20053.8161704948. The cubic root of 402155543 is about 738.1274441275.

The spelling of 402155543 in words is "four hundred two million, one hundred fifty-five thousand, five hundred forty-three".