51067421 has 6 divisors (see below), whose sum is σ = 53897022. Its totient is φ = 48379320.

The previous prime is 51067409. The next prime is 51067441. The reversal of 51067421 is 12476015.

51067421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 28504921 + 22562500 = 5339^2 + 4750^2 .

It is not a de Polignac number, because 51067421 - 2¹⁰ = 51066397 is a prime.

It is a super-3 number, since 3×51067421³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51067441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70370 + ... + 71091.

It is an arithmetic number, because the mean of its divisors is an integer number (8982837).

Almost surely, 2^51067421 is an apocalyptic number.

It is an amenable number.

51067421 is a deficient number, since it is larger than the sum of its proper divisors (2829601).

51067421 is a wasteful number, since it uses less digits than its factorization.

51067421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141499 (or 141480 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 51067421 is about 7146.1472836767. The cubic root of 51067421 is about 371.0063206834.

The spelling of 51067421 in words is "fifty-one million, sixty-seven thousand, four hundred twenty-one".