51294619 has 4 divisors (see below), whose sum is σ = 52262496. Its totient is φ = 50326744.

The previous prime is 51294613. The next prime is 51294629. The reversal of 51294619 is 91649215.

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 51294619 - 2¹⁹ = 50770331 is a prime.

It is a super-2 number, since 2×51294619² = 5262275876710322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51294613) 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, 483859 + ... + 483964.

It is an arithmetic number, because the mean of its divisors is an integer number (13065624).

Almost surely, 2^51294619 is an apocalyptic number.

51294619 is a deficient number, since it is larger than the sum of its proper divisors (967877).

51294619 is an equidigital number, since it uses as much as digits as its factorization.

51294619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967876.

The product of its digits is 19440, while the sum is 37.

The square root of 51294619 is about 7162.0261797902. The cubic root of 51294619 is about 371.5557068093. Note that the first 3 decimals are identical.

The spelling of 51294619 in words is "fifty-one million, two hundred ninety-four thousand, six hundred nineteen".