213213026 has 16 divisors (see below), whose sum is σ = 344958264. Its totient is φ = 98252544.

The previous prime is 213213023. The next prime is 213213029. The reversal of 213213026 is 620312312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213213023) and next prime (213213029).

It can be written as a sum of positive squares in 4 ways, for example, as 190412401 + 22800625 = 13799^2 + 4775^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213212989 and 213213007.

It is not an unprimeable number, because it can be changed into a prime (213213023) 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, 11546 + ... + 23658.

Almost surely, 2^213213026 is an apocalyptic number.

213213026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213213026 is a deficient number, since it is larger than the sum of its proper divisors (131745238).

213213026 is a wasteful number, since it uses less digits than its factorization.

213213026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 213213026 is about 14601.8158459830. The cubic root of 213213026 is about 597.4082897003.

Adding to 213213026 its reverse (620312312), we get a palindrome (833525338).

The spelling of 213213026 in words is "two hundred thirteen million, two hundred thirteen thousand, twenty-six".