1243231431 has 24 divisors (see below), whose sum is σ = 1821801600. Its totient is φ = 753626016.

The previous prime is 1243231411. The next prime is 1243231447. The reversal of 1243231431 is 1341323421.

It is a happy number.

It is not a de Polignac number, because 1243231431 - 2¹⁹ = 1242707143 is a prime.

It is a super-2 number, since 2×1243231431² = 3091248782052615522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243231411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15670 + ... + 52268.

It is an arithmetic number, because the mean of its divisors is an integer number (75908400).

Almost surely, 2^1243231431 is an apocalyptic number.

1243231431 is a deficient number, since it is larger than the sum of its proper divisors (578570169).

1243231431 is a wasteful number, since it uses less digits than its factorization.

1243231431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36695 (or 36682 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 1243231431 is about 35259.4871063094. The cubic root of 1243231431 is about 1075.2694996931.

Adding to 1243231431 its reverse (1341323421), we get a palindrome (2584554852).

The spelling of 1243231431 in words is "one billion, two hundred forty-three million, two hundred thirty-one thousand, four hundred thirty-one".