51357469 has 4 divisors (see below), whose sum is σ = 51702300. Its totient is φ = 51012640.

The previous prime is 51357431. The next prime is 51357473. The reversal of 51357469 is 96475315.

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 26656569 + 24700900 = 5163^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 51357469 - 2²¹ = 49260317 is a prime.

It is a super-2 number, since 2×51357469² = 5275179244171922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51357409) 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, 172192 + ... + 172489.

It is an arithmetic number, because the mean of its divisors is an integer number (12925575).

Almost surely, 2^51357469 is an apocalyptic number.

It is an amenable number.

51357469 is a deficient number, since it is larger than the sum of its proper divisors (344831).

51357469 is a wasteful number, since it uses less digits than its factorization.

51357469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344830.

The product of its digits is 113400, while the sum is 40.

The square root of 51357469 is about 7166.4125613866. The cubic root of 51357469 is about 371.7073974769.

The spelling of 51357469 in words is "fifty-one million, three hundred fifty-seven thousand, four hundred sixty-nine".