51421361 has 8 divisors (see below), whose sum is σ = 52341504. Its totient is φ = 50505840.

The previous prime is 51421351. The next prime is 51421367. The reversal of 51421361 is 16312415.

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 51421361 - 2¹⁰ = 51420337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51421367) 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, 27296 + ... + 29118.

It is an arithmetic number, because the mean of its divisors is an integer number (6542688).

Almost surely, 2^51421361 is an apocalyptic number.

It is an amenable number.

51421361 is a deficient number, since it is larger than the sum of its proper divisors (920143).

51421361 is a wasteful number, since it uses less digits than its factorization.

51421361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311.

The product of its digits is 720, while the sum is 23.

The square root of 51421361 is about 7170.8689152710. The cubic root of 51421361 is about 371.8614762495.

Adding to 51421361 its reverse (16312415), we get a palindrome (67733776).

The spelling of 51421361 in words is "fifty-one million, four hundred twenty-one thousand, three hundred sixty-one".