51517469 has 4 divisors (see below), whose sum is σ = 51531900. Its totient is φ = 51503040.

The previous prime is 51517457. The next prime is 51517471. The reversal of 51517469 is 96471515.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 39000025 + 12517444 = 6245^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 51517469 - 2¹² = 51513373 is a prime.

It is a super-2 number, since 2×51517469² = 5308099224331922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51517409) 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, 2507 + ... + 10455.

It is an arithmetic number, because the mean of its divisors is an integer number (12882975).

Almost surely, 2^51517469 is an apocalyptic number.

It is an amenable number.

51517469 is a deficient number, since it is larger than the sum of its proper divisors (14431).

51517469 is an equidigital number, since it uses as much as digits as its factorization.

51517469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14430.

The product of its digits is 37800, while the sum is 38.

The square root of 51517469 is about 7177.5670669106. The cubic root of 51517469 is about 372.0930053229.

The spelling of 51517469 in words is "fifty-one million, five hundred seventeen thousand, four hundred sixty-nine".