1230723551 has 12 divisors (see below), whose sum is σ = 1310465112. Its totient is φ = 1155593088.

The previous prime is 1230723521. The next prime is 1230723577. The reversal of 1230723551 is 1553270321.

It is not a de Polignac number, because 1230723551 - 2¹⁴ = 1230707167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230723521) 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 in 11 ways as a sum of consecutive naturals, for example, 123221 + ... + 132833.

It is an arithmetic number, because the mean of its divisors is an integer number (109205426).

Almost surely, 2^1230723551 is an apocalyptic number.

1230723551 is a deficient number, since it is larger than the sum of its proper divisors (79741561).

1230723551 is an equidigital number, since it uses as much as digits as its factorization.

1230723551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10090 (or 10073 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 1230723551 is about 35081.6697293615. The cubic root of 1230723551 is about 1071.6513213002.

Adding to 1230723551 its reverse (1553270321), we get a palindrome (2783993872).

The spelling of 1230723551 in words is "one billion, two hundred thirty million, seven hundred twenty-three thousand, five hundred fifty-one".