213142426 has 32 divisors (see below), whose sum is σ = 386684928. Its totient is φ = 86135280.

The previous prime is 213142411. The next prime is 213142429. The reversal of 213142426 is 624241312.

It is a happy number.

213142426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213142426² = 90859387522330952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213142426.

It is not an unprimeable number, because it can be changed into a prime (213142429) 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, 18201 + ... + 27523.

It is an arithmetic number, because the mean of its divisors is an integer number (12083904).

Almost surely, 2^213142426 is an apocalyptic number.

213142426 is a deficient number, since it is larger than the sum of its proper divisors (173542502).

213142426 is a wasteful number, since it uses less digits than its factorization.

213142426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426.

The product of its digits is 2304, while the sum is 25.

The square root of 213142426 is about 14599.3981382795. The cubic root of 213142426 is about 597.3423436335.

Adding to 213142426 its reverse (624241312), we get a palindrome (837383738).

The spelling of 213142426 in words is "two hundred thirteen million, one hundred forty-two thousand, four hundred twenty-six".