2251331243 has 8 divisors (see below), whose sum is σ = 2575020000. Its totient is φ = 1928160000.

The previous prime is 2251331239. The next prime is 2251331249. The reversal of 2251331243 is 3421331522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251331243 - 2² = 2251331239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2251331249) 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, 120008 + ... + 137493.

It is an arithmetic number, because the mean of its divisors is an integer number (321877500).

Almost surely, 2^2251331243 is an apocalyptic number.

2251331243 is a deficient number, since it is larger than the sum of its proper divisors (323688757).

2251331243 is a wasteful number, since it uses less digits than its factorization.

2251331243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258757.

The product of its digits is 4320, while the sum is 26.

The square root of 2251331243 is about 47448.1953608354. The cubic root of 2251331243 is about 1310.6290790147.

Adding to 2251331243 its reverse (3421331522), we get a palindrome (5672662765).

The spelling of 2251331243 in words is "two billion, two hundred fifty-one million, three hundred thirty-one thousand, two hundred forty-three".