1553245551 has 48 divisors (see below), whose sum is σ = 2733494400. Its totient is φ = 868929120.

The previous prime is 1553245541. The next prime is 1553245553. The reversal of 1553245551 is 1555423551.

1553245551 is a `hidden beast` number, since 1 + 553 + 2 + 4 + 55 + 51 = 666.

It is not a de Polignac number, because 1553245551 - 2¹⁰ = 1553244527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553245553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12400 + ... + 57098.

It is an arithmetic number, because the mean of its divisors is an integer number (56947800).

Almost surely, 2^1553245551 is an apocalyptic number.

1553245551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1553245551 is a deficient number, since it is larger than the sum of its proper divisors (1180248849).

1553245551 is a wasteful number, since it uses less digits than its factorization.

1553245551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44738 (or 44726 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 1553245551 is about 39411.2363546235. The cubic root of 1553245551 is about 1158.1017186279.

The spelling of 1553245551 in words is "one billion, five hundred fifty-three million, two hundred forty-five thousand, five hundred fifty-one".