213402500 has 30 divisors (see below), whose sum is σ = 466674054. Its totient is φ = 85360000.

The previous prime is 213402457. The next prime is 213402517. The reversal of 213402500 is 5204312.

It can be written as a sum of positive squares in 5 ways, for example, as 60435076 + 152967424 = 7774^2 + 12368^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40181 + ... + 45180.

Almost surely, 2^213402500 is an apocalyptic number.

213402500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213402500 is an abundant number, since it is smaller than the sum of its proper divisors (253271554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213402500 is an equidigital number, since it uses as much as digits as its factorization.

213402500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85385 (or 85368 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 213402500 is about 14608.3024338901. The cubic root of 213402500 is about 597.5852016942.

Adding to 213402500 its reverse (5204312), we get a palindrome (218606812).

The spelling of 213402500 in words is "two hundred thirteen million, four hundred two thousand, five hundred".