402212055 has 32 divisors (see below), whose sum is σ = 746463744. Its totient is φ = 181120896.

The previous prime is 402212053. The next prime is 402212077. The reversal of 402212055 is 550212204.

It is a happy number.

It is not a de Polignac number, because 402212055 - 2¹ = 402212053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402212053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21552 + ... + 35621.

It is an arithmetic number, because the mean of its divisors is an integer number (23326992).

Almost surely, 2^402212055 is an apocalyptic number.

402212055 is a deficient number, since it is larger than the sum of its proper divisors (344251689).

402212055 is a wasteful number, since it uses less digits than its factorization.

402212055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57255.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 402212055 is about 20055.2251296264. The cubic root of 402212055 is about 738.1620170725.

Adding to 402212055 its reverse (550212204), we get a palindrome (952424259).

The spelling of 402212055 in words is "four hundred two million, two hundred twelve thousand, fifty-five".