51422261 has 8 divisors (see below), whose sum is σ = 56179200. Its totient is φ = 46679040.

The previous prime is 51422257. The next prime is 51422311. The reversal of 51422261 is 16222415.

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 51422261 - 2² = 51422257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51422201) 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, 5420 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (7022400).

Almost surely, 2^51422261 is an apocalyptic number.

It is an amenable number.

51422261 is a deficient number, since it is larger than the sum of its proper divisors (4756939).

51422261 is a wasteful number, since it uses less digits than its factorization.

51422261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6859.

The product of its digits is 960, while the sum is 23.

The square root of 51422261 is about 7170.9316688977. The cubic root of 51422261 is about 371.8636457329.

Adding to 51422261 its reverse (16222415), we get a palindrome (67644676).

The spelling of 51422261 in words is "fifty-one million, four hundred twenty-two thousand, two hundred sixty-one".