551238867 has 12 divisors (see below), whose sum is σ = 798244720. Its totient is φ = 366564528.

The previous prime is 551238827. The next prime is 551238893. The reversal of 551238867 is 768832155.

551238867 is a `hidden beast` number, since 551 + 2 + 38 + 8 + 67 = 666.

It is not a de Polignac number, because 551238867 - 2⁶ = 551238803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551238827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73567 + ... + 80712.

Almost surely, 2^551238867 is an apocalyptic number.

551238867 is a deficient number, since it is larger than the sum of its proper divisors (247005853).

551238867 is a wasteful number, since it uses less digits than its factorization.

551238867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154682 (or 154679 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 551238867 is about 23478.4766754575. The cubic root of 551238867 is about 819.9359790390.

The spelling of 551238867 in words is "five hundred fifty-one million, two hundred thirty-eight thousand, eight hundred sixty-seven".