842281551 has 16 divisors (see below), whose sum is σ = 1302078720. Its totient is φ = 537106680.

The previous prime is 842281537. The next prime is 842281553. The reversal of 842281551 is 155182248.

842281551 is a `hidden beast` number, since 8 + 4 + 22 + 81 + 551 = 666.

It is not a de Polignac number, because 842281551 - 2⁶ = 842281487 is a prime.

It is a super-2 number, since 2×842281551² = 1418876422309931202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842281553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677545 + ... + 678786.

It is an arithmetic number, because the mean of its divisors is an integer number (81379920).

Almost surely, 2^842281551 is an apocalyptic number.

842281551 is a deficient number, since it is larger than the sum of its proper divisors (459797169).

842281551 is a wasteful number, since it uses less digits than its factorization.

842281551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356363 (or 1356357 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 842281551 is about 29022.0872957132. The cubic root of 842281551 is about 944.3922824858.

The spelling of 842281551 in words is "eight hundred forty-two million, two hundred eighty-one thousand, five hundred fifty-one".