213956446 has 16 divisors (see below), whose sum is σ = 350664048. Its totient is φ = 97099200.

The previous prime is 213956437. The next prime is 213956447. The reversal of 213956446 is 644659312.

It is a junction number, because it is equal to n+sod(n) for n = 213956399 and 213956408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213956447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7186 + ... + 21898.

It is an arithmetic number, because the mean of its divisors is an integer number (21916503).

Almost surely, 2^213956446 is an apocalyptic number.

213956446 is a deficient number, since it is larger than the sum of its proper divisors (136707602).

213956446 is a wasteful number, since it uses less digits than its factorization.

213956446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15387.

The product of its digits is 155520, while the sum is 40.

The square root of 213956446 is about 14627.2501175033. The cubic root of 213956446 is about 598.1018215674.

It can be divided in two parts, 2139 and 56446, that added together give a palindrome (58585).

The spelling of 213956446 in words is "two hundred thirteen million, nine hundred fifty-six thousand, four hundred forty-six".