402185055 has 16 divisors (see below), whose sum is σ = 644014944. Its totient is φ = 214325760.

The previous prime is 402185051. The next prime is 402185057. The reversal of 402185055 is 550581204.

It is not a de Polignac number, because 402185055 - 2² = 402185051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402185051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9667 + ... + 29963.

It is an arithmetic number, because the mean of its divisors is an integer number (40250934).

Almost surely, 2^402185055 is an apocalyptic number.

402185055 is a deficient number, since it is larger than the sum of its proper divisors (241829889).

402185055 is a wasteful number, since it uses less digits than its factorization.

402185055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21626.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 402185055 is about 20054.5519770450. The cubic root of 402185055 is about 738.1454994004.

It can be divided in two parts, 40 and 2185055, that added together give a triangular number (2185095 = T₂₀₉₀).

The spelling of 402185055 in words is "four hundred two million, one hundred eighty-five thousand, fifty-five".