402402213 has 12 divisors (see below), whose sum is σ = 594765600. Its totient is φ = 262029096.

The previous prime is 402402199. The next prime is 402402239. The reversal of 402402213 is 312204204.

402402213 is a `hidden beast` number, since 402 + 40 + 221 + 3 = 666.

It is not a de Polignac number, because 402402213 - 2⁸ = 402401957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402402293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 519513 + ... + 520286.

It is an arithmetic number, because the mean of its divisors is an integer number (49563800).

Almost surely, 2^402402213 is an apocalyptic number.

402402213 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

402402213 is a deficient number, since it is larger than the sum of its proper divisors (192363387).

402402213 is a wasteful number, since it uses less digits than its factorization.

402402213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039848 (or 1039845 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402402213 is about 20059.9654286841. The cubic root of 402402213 is about 738.2783282703.

Adding to 402402213 its reverse (312204204), we get a palindrome (714606417).

The spelling of 402402213 in words is "four hundred two million, four hundred two thousand, two hundred thirteen".