1252213231 has 4 divisors (see below), whose sum is σ = 1252901952. Its totient is φ = 1251524512.

The previous prime is 1252213201. The next prime is 1252213241. The reversal of 1252213231 is 1323122521.

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

It is a cyclic number.

It is not a de Polignac number, because 1252213231 - 2¹¹ = 1252211183 is a prime.

It is a super-2 number, since 2×1252213231² = 3136075951782918722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252213201) 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, 341626 + ... + 345271.

It is an arithmetic number, because the mean of its divisors is an integer number (313225488).

Almost surely, 2^1252213231 is an apocalyptic number.

1252213231 is a deficient number, since it is larger than the sum of its proper divisors (688721).

1252213231 is an equidigital number, since it uses as much as digits as its factorization.

1252213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688720.

The product of its digits is 720, while the sum is 22.

The square root of 1252213231 is about 35386.6250298047. The cubic root of 1252213231 is about 1077.8527383765.

Adding to 1252213231 its reverse (1323122521), we get a palindrome (2575335752).

The spelling of 1252213231 in words is "one billion, two hundred fifty-two million, two hundred thirteen thousand, two hundred thirty-one".