51419221 has 8 divisors (see below), whose sum is σ = 58835520. Its totient is φ = 44020608.

The previous prime is 51419209. The next prime is 51419257. The reversal of 51419221 is 12291415.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51419221 - 2⁵ = 51419189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51419281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (7354440).

Almost surely, 2^51419221 is an apocalyptic number.

It is an amenable number.

51419221 is a deficient number, since it is larger than the sum of its proper divisors (7416299).

51419221 is an equidigital number, since it uses as much as digits as its factorization.

51419221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8843.

The product of its digits is 720, while the sum is 25.

The square root of 51419221 is about 7170.7196988866. The cubic root of 51419221 is about 371.8563175983.

The spelling of 51419221 in words is "fifty-one million, four hundred nineteen thousand, two hundred twenty-one".