1231553425 has 12 divisors (see below), whose sum is σ = 1528335216. Its totient is φ = 984462800.

The previous prime is 1231553413. The next prime is 1231553441. The reversal of 1231553425 is 5243551321.

It is not a de Polignac number, because 1231553425 - 2¹⁵ = 1231520657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13830 + ... + 51520.

It is an arithmetic number, because the mean of its divisors is an integer number (127361268).

Almost surely, 2^1231553425 is an apocalyptic number.

It is an amenable number.

1231553425 is a deficient number, since it is larger than the sum of its proper divisors (296781791).

1231553425 is a wasteful number, since it uses less digits than its factorization.

1231553425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39008 (or 39003 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 1231553425 is about 35093.4954799319. The cubic root of 1231553425 is about 1071.8921378374.

The spelling of 1231553425 in words is "one billion, two hundred thirty-one million, five hundred fifty-three thousand, four hundred twenty-five".