1230051553 has 4 divisors (see below), whose sum is σ = 1230124228. Its totient is φ = 1229978880.

The previous prime is 1230051551. The next prime is 1230051577. The reversal of 1230051553 is 3551500321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 425308129 + 804743424 = 20623^2 + 28368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230051553 - 2¹ = 1230051551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230051551) 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, 3913 + ... + 49753.

It is an arithmetic number, because the mean of its divisors is an integer number (307531057).

Almost surely, 2^1230051553 is an apocalyptic number.

It is an amenable number.

1230051553 is a deficient number, since it is larger than the sum of its proper divisors (72675).

1230051553 is an equidigital number, since it uses as much as digits as its factorization.

1230051553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72674.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1230051553 is about 35072.0907988104. The cubic root of 1230051553 is about 1071.4562385905.

Adding to 1230051553 its reverse (3551500321), we get a palindrome (4781551874).

The spelling of 1230051553 in words is "one billion, two hundred thirty million, fifty-one thousand, five hundred fifty-three".