551474551 has 4 divisors (see below), whose sum is σ = 553111312. Its totient is φ = 549837792.

The previous prime is 551474549. The next prime is 551474569. The reversal of 551474551 is 155474155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155474155 = 5 ⋅31094831.

It is a cyclic number.

It is not a de Polignac number, because 551474551 - 2¹ = 551474549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551474551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551474501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817875 + ... + 818548.

It is an arithmetic number, because the mean of its divisors is an integer number (138277828).

Almost surely, 2^551474551 is an apocalyptic number.

551474551 is a deficient number, since it is larger than the sum of its proper divisors (1636761).

551474551 is a wasteful number, since it uses less digits than its factorization.

551474551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636760.

The product of its digits is 70000, while the sum is 37.

The square root of 551474551 is about 23483.4952892452. The cubic root of 551474551 is about 820.0528178352.

The spelling of 551474551 in words is "five hundred fifty-one million, four hundred seventy-four thousand, five hundred fifty-one".