842047551 has 12 divisors (see below), whose sum is σ = 1217071440. Its totient is φ = 561004800.

The previous prime is 842047523. The next prime is 842047559. The reversal of 842047551 is 155740248.

842047551 is a `hidden beast` number, since 84 + 20 + 4 + 7 + 551 = 666.

It is not a de Polignac number, because 842047551 - 2⁶ = 842047487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842047559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14811 + ... + 43628.

It is an arithmetic number, because the mean of its divisors is an integer number (101422620).

Almost surely, 2^842047551 is an apocalyptic number.

842047551 is a deficient number, since it is larger than the sum of its proper divisors (375023889).

842047551 is a wasteful number, since it uses less digits than its factorization.

842047551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60046 (or 60043 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 842047551 is about 29018.0556033653. The cubic root of 842047551 is about 944.3048183587.

Adding to 842047551 its reverse (155740248), we get a palindrome (997787799).

The spelling of 842047551 in words is "eight hundred forty-two million, forty-seven thousand, five hundred fifty-one".