213122023 has 4 divisors (see below), whose sum is σ = 213151840. Its totient is φ = 213092208.

The previous prime is 213121991. The next prime is 213122029. The reversal of 213122023 is 320221312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213122023 - 2⁵ = 213121991 is a prime.

It is a super-2 number, since 2×213122023² = 90841993375225058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213121988 and 213122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2923 + ... + 20851.

It is an arithmetic number, because the mean of its divisors is an integer number (53287960).

Almost surely, 2^213122023 is an apocalyptic number.

213122023 is a deficient number, since it is larger than the sum of its proper divisors (29817).

213122023 is a wasteful number, since it uses less digits than its factorization.

213122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29816.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213122023 is about 14598.6993598745. The cubic root of 213122023 is about 597.3232828815.

Adding to 213122023 its reverse (320221312), we get a palindrome (533343335).

The spelling of 213122023 in words is "two hundred thirteen million, one hundred twenty-two thousand, twenty-three".