1231413533 has 16 divisors (see below), whose sum is σ = 1419707520. Its totient is φ = 1046255616.

The previous prime is 1231413529. The next prime is 1231413551. The reversal of 1231413533 is 3353141321.

It is not a de Polignac number, because 1231413533 - 2² = 1231413529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231413133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413273 + ... + 416241.

It is an arithmetic number, because the mean of its divisors is an integer number (88731720).

Almost surely, 2^1231413533 is an apocalyptic number.

It is an amenable number.

1231413533 is a deficient number, since it is larger than the sum of its proper divisors (188293987).

1231413533 is a wasteful number, since it uses less digits than its factorization.

1231413533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476.

The product of its digits is 3240, while the sum is 26.

The square root of 1231413533 is about 35091.5022904406. The cubic root of 1231413533 is about 1071.8515509358.

Adding to 1231413533 its reverse (3353141321), we get a palindrome (4584554854).

The spelling of 1231413533 in words is "one billion, two hundred thirty-one million, four hundred thirteen thousand, five hundred thirty-three".