1553105425 has 12 divisors (see below), whose sum is σ = 1987975936. Its totient is φ = 1202403600.

The previous prime is 1553105413. The next prime is 1553105443. The reversal of 1553105425 is 5245013551.

It is not a de Polignac number, because 1553105425 - 2¹⁹ = 1552581137 is a prime.

It is a super-2 number, since 2×1553105425² = 4824272922328861250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 1001229 + ... + 1002778.

Almost surely, 2^1553105425 is an apocalyptic number.

It is an amenable number.

1553105425 is a deficient number, since it is larger than the sum of its proper divisors (434870511).

1553105425 is a wasteful number, since it uses less digits than its factorization.

1553105425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004048 (or 2004043 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1553105425 is about 39409.4585727843. The cubic root of 1553105425 is about 1158.0668915435.

Adding to 1553105425 its reverse (5245013551), we get a palindrome (6798118976).

The spelling of 1553105425 in words is "one billion, five hundred fifty-three million, one hundred five thousand, four hundred twenty-five".