551771397 has 24 divisors (see below), whose sum is σ = 847656576. Its totient is φ = 344662656.

The previous prime is 551771369. The next prime is 551771401. The reversal of 551771397 is 793177155.

551771397 is a `hidden beast` number, since 551 + 7 + 7 + 1 + 3 + 97 = 666.

It is not a de Polignac number, because 551771397 - 2²³ = 543382789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551771897) 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 23 ways as a sum of consecutive naturals, for example, 26788 + ... + 42674.

It is an arithmetic number, because the mean of its divisors is an integer number (35319024).

Almost surely, 2^551771397 is an apocalyptic number.

It is an amenable number.

551771397 is a deficient number, since it is larger than the sum of its proper divisors (295885179).

551771397 is a wasteful number, since it uses less digits than its factorization.

551771397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16137 (or 16134 counting only the distinct ones).

The product of its digits is 231525, while the sum is 45.

The square root of 551771397 is about 23489.8147502274. The cubic root of 551771397 is about 820.1999299330.

The spelling of 551771397 in words is "five hundred fifty-one million, seven hundred seventy-one thousand, three hundred ninety-seven".