51021443 has 8 divisors (see below), whose sum is σ = 57455616. Its totient is φ = 44886600.

The previous prime is 51021431. The next prime is 51021473. The reversal of 51021443 is 34412015.

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

It is not a de Polignac number, because 51021443 - 2⁴ = 51021427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51021413) 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, 74471 + ... + 75152.

It is an arithmetic number, because the mean of its divisors is an integer number (7181952).

Almost surely, 2^51021443 is an apocalyptic number.

51021443 is a deficient number, since it is larger than the sum of its proper divisors (6434173).

51021443 is a wasteful number, since it uses less digits than its factorization.

51021443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149665.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51021443 is about 7142.9295810613. The cubic root of 51021443 is about 370.8949434086.

Adding to 51021443 its reverse (34412015), we get a palindrome (85433458).

The spelling of 51021443 in words is "fifty-one million, twenty-one thousand, four hundred forty-three".