2231431144 has 8 divisors (see below), whose sum is σ = 4183933410. Its totient is φ = 1115715568.

The previous prime is 2231431093. The next prime is 2231431151. The reversal of 2231431144 is 4411341322.

It can be written as a sum of positive squares in only one way, i.e., 2231428644 + 2500 = 47238^2 + 50^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×2231431144³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139464439 + ... + 139464454.

Almost surely, 2^2231431144 is an apocalyptic number.

It is an amenable number.

2231431144 is a deficient number, since it is larger than the sum of its proper divisors (1952502266).

2231431144 is a wasteful number, since it uses less digits than its factorization.

2231431144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278928899 (or 278928895 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 2231431144 is about 47238.0264617395. The cubic root of 2231431144 is about 1306.7559816199.

Adding to 2231431144 its reverse (4411341322), we get a palindrome (6642772466).

The spelling of 2231431144 in words is "two billion, two hundred thirty-one million, four hundred thirty-one thousand, one hundred forty-four".