213724263 has 4 divisors (see below), whose sum is σ = 284965688. Its totient is φ = 142482840.

The previous prime is 213724243. The next prime is 213724283. The reversal of 213724263 is 362427312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213724243) and next prime (213724283).

It is not a de Polignac number, because 213724263 - 2²⁵ = 180169831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213724263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213724213) 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, 35620708 + ... + 35620713.

It is an arithmetic number, because the mean of its divisors is an integer number (71241422).

Almost surely, 2^213724263 is an apocalyptic number.

213724263 is a deficient number, since it is larger than the sum of its proper divisors (71241425).

213724263 is an equidigital number, since it uses as much as digits as its factorization.

213724263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71241424.

The product of its digits is 12096, while the sum is 30.

The square root of 213724263 is about 14619.3113038884. The cubic root of 213724263 is about 597.8853922565.

The spelling of 213724263 in words is "two hundred thirteen million, seven hundred twenty-four thousand, two hundred sixty-three".