1232403551 has 2 divisors, whose sum is σ = 1232403552. Its totient is φ = 1232403550.

The previous prime is 1232403547. The next prime is 1232403611. The reversal of 1232403551 is 1553042321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1232403551 - 2² = 1232403547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1232403551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232403451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616201775 + 616201776.

It is an arithmetic number, because the mean of its divisors is an integer number (616201776).

Almost surely, 2^1232403551 is an apocalyptic number.

1232403551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232403551 is an equidigital number, since it uses as much as digits as its factorization.

1232403551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1232403551 is about 35105.6056919689. The cubic root of 1232403551 is about 1072.1387190424.

Adding to 1232403551 its reverse (1553042321), we get a palindrome (2785445872).

The spelling of 1232403551 in words is "one billion, two hundred thirty-two million, four hundred three thousand, five hundred fifty-one".