51648419 has 4 divisors (see below), whose sum is σ = 51698160. Its totient is φ = 51598680.

The previous prime is 51648413. The next prime is 51648427. The reversal of 51648419 is 91484615.

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

It is a cyclic number.

It is not a de Polignac number, because 51648419 - 2¹² = 51644323 is a prime.

It is a super-2 number, since 2×51648419² = 5335118370399122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51648413) 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, 23279 + ... + 25400.

It is an arithmetic number, because the mean of its divisors is an integer number (12924540).

Almost surely, 2^51648419 is an apocalyptic number.

51648419 is a deficient number, since it is larger than the sum of its proper divisors (49741).

51648419 is a wasteful number, since it uses less digits than its factorization.

51648419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49740.

The product of its digits is 34560, while the sum is 38.

The square root of 51648419 is about 7186.6834492692. The cubic root of 51648419 is about 372.4080075524.

The spelling of 51648419 in words is "fifty-one million, six hundred forty-eight thousand, four hundred nineteen".