1213525433 has 4 divisors (see below), whose sum is σ = 1284909300. Its totient is φ = 1142141568.

The previous prime is 1213525427. The next prime is 1213525463. The reversal of 1213525433 is 3345253121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 855445504 + 358079929 = 29248^2 + 18923^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213525433 - 2⁸ = 1213525177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213525396 and 1213525405.

It is not an unprimeable number, because it can be changed into a prime (1213525463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35691908 + ... + 35691941.

It is an arithmetic number, because the mean of its divisors is an integer number (321227325).

Almost surely, 2^1213525433 is an apocalyptic number.

It is an amenable number.

1213525433 is a deficient number, since it is larger than the sum of its proper divisors (71383867).

1213525433 is an equidigital number, since it uses as much as digits as its factorization.

1213525433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71383866.

The product of its digits is 10800, while the sum is 29.

The square root of 1213525433 is about 34835.6919408816. The cubic root of 1213525433 is about 1066.6361394367.

Adding to 1213525433 its reverse (3345253121), we get a palindrome (4558778554).

The spelling of 1213525433 in words is "one billion, two hundred thirteen million, five hundred twenty-five thousand, four hundred thirty-three".