1553425551 has 12 divisors (see below), whose sum is σ = 2266054440. Its totient is φ = 1025362800.

The previous prime is 1553425547. The next prime is 1553425553. The reversal of 1553425551 is 1555243551.

1553425551 is a `hidden beast` number, since 1 + 55 + 34 + 25 + 551 = 666.

It is not a de Polignac number, because 1553425551 - 2² = 1553425547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553425553) 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 11 ways as a sum of consecutive naturals, for example, 853561 + ... + 855378.

It is an arithmetic number, because the mean of its divisors is an integer number (188837870).

Almost surely, 2^1553425551 is an apocalyptic number.

1553425551 is a deficient number, since it is larger than the sum of its proper divisors (712628889).

1553425551 is a wasteful number, since it uses less digits than its factorization.

1553425551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709046 (or 1709043 counting only the distinct ones).

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

The square root of 1553425551 is about 39413.5199011710. The cubic root of 1553425551 is about 1158.1464529709.

The spelling of 1553425551 in words is "one billion, five hundred fifty-three million, four hundred twenty-five thousand, five hundred fifty-one".