1531142233 has 2 divisors, whose sum is σ = 1531142234. Its totient is φ = 1531142232.

The previous prime is 1531142219. The next prime is 1531142243. The reversal of 1531142233 is 3322411351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1511887689 + 19254544 = 38883^2 + 4388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531142233 - 2⁵ = 1531142201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531142198 and 1531142207.

It is not a weakly prime, because it can be changed into another prime (1531142243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765571116 + 765571117.

It is an arithmetic number, because the mean of its divisors is an integer number (765571117).

It is a self-describing number.

Almost surely, 2^1531142233 is an apocalyptic number.

It is an amenable number.

1531142233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531142233 is an equidigital number, since it uses as much as digits as its factorization.

1531142233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 1531142233 is about 39129.8125858021. The cubic root of 1531142233 is about 1152.5820327673.

Adding to 1531142233 its reverse (3322411351), we get a palindrome (4853553584).

The spelling of 1531142233 in words is "one billion, five hundred thirty-one million, one hundred forty-two thousand, two hundred thirty-three".