51769469 has 4 divisors (see below), whose sum is σ = 52282140. Its totient is φ = 51256800.

The previous prime is 51769457. The next prime is 51769477. The reversal of 51769469 is 96496715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49632025 + 2137444 = 7045^2 + 1462^2 .

It is a cyclic number.

It is not a de Polignac number, because 51769469 - 2¹⁶ = 51703933 is a prime.

It is a super-2 number, since 2×51769469² = 5360155841083922, 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 (51769409) 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, 256184 + ... + 256385.

It is an arithmetic number, because the mean of its divisors is an integer number (13070535).

Almost surely, 2^51769469 is an apocalyptic number.

It is an amenable number.

51769469 is a deficient number, since it is larger than the sum of its proper divisors (512671).

51769469 is a wasteful number, since it uses less digits than its factorization.

51769469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512670.

The product of its digits is 408240, while the sum is 47.

The square root of 51769469 is about 7195.1003467638. The cubic root of 51769469 is about 372.6987219473.

The spelling of 51769469 in words is "fifty-one million, seven hundred sixty-nine thousand, four hundred sixty-nine".