51674421 has 4 divisors (see below), whose sum is σ = 68899232. Its totient is φ = 34449612.

The previous prime is 51674411. The next prime is 51674431. The reversal of 51674421 is 12447615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (51674411) and next prime (51674431).

It is not a de Polignac number, because 51674421 - 2¹⁰ = 51673397 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 (51674401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8612401 + ... + 8612406.

It is an arithmetic number, because the mean of its divisors is an integer number (17224808).

Almost surely, 2^51674421 is an apocalyptic number.

It is an amenable number.

51674421 is a deficient number, since it is larger than the sum of its proper divisors (17224811).

51674421 is a wasteful number, since it uses less digits than its factorization.

51674421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17224810.

The product of its digits is 6720, while the sum is 30.

The square root of 51674421 is about 7188.4922619420. The cubic root of 51674421 is about 372.4704923851.

The spelling of 51674421 in words is "fifty-one million, six hundred seventy-four thousand, four hundred twenty-one".