1551617055 has 24 divisors (see below), whose sum is σ = 2710010160. Its totient is φ = 821208960.

The previous prime is 1551617033. The next prime is 1551617069. The reversal of 1551617055 is 5507161551.

It is a happy number.

It is not a de Polignac number, because 1551617055 - 2⁸ = 1551616799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125710 + ... + 137499.

It is an arithmetic number, because the mean of its divisors is an integer number (112917090).

Almost surely, 2^1551617055 is an apocalyptic number.

1551617055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551617055 is a deficient number, since it is larger than the sum of its proper divisors (1158393105).

1551617055 is a wasteful number, since it uses less digits than its factorization.

1551617055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263351 (or 263348 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The square root of 1551617055 is about 39390.5706356229. The cubic root of 1551617055 is about 1157.6968409165.

The spelling of 1551617055 in words is "one billion, five hundred fifty-one million, six hundred seventeen thousand, fifty-five".