51396469 has 4 divisors (see below), whose sum is σ = 51426144. Its totient is φ = 51366796.

The previous prime is 51396461. The next prime is 51396473. The reversal of 51396469 is 96469315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96469315 = 5 ⋅19293863.

It is a cyclic number.

It is not a de Polignac number, because 51396469 - 2³ = 51396461 is a prime.

It is a super-2 number, since 2×51396469² = 5283194051335922, 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 (51396461) 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, 12067 + ... + 15760.

It is an arithmetic number, because the mean of its divisors is an integer number (12856536).

Almost surely, 2^51396469 is an apocalyptic number.

It is an amenable number.

51396469 is a deficient number, since it is larger than the sum of its proper divisors (29675).

51396469 is a wasteful number, since it uses less digits than its factorization.

51396469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29674.

The product of its digits is 174960, while the sum is 43.

The square root of 51396469 is about 7169.1330717179. The cubic root of 51396469 is about 371.8014631233.

The spelling of 51396469 in words is "fifty-one million, three hundred ninety-six thousand, four hundred sixty-nine".