51384212 has 12 divisors (see below), whose sum is σ = 98097216. Its totient is φ = 23356440.

The previous prime is 51384211. The next prime is 51384233. The reversal of 51384212 is 21248315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51384211) 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, 583868 + ... + 583955.

It is an arithmetic number, because the mean of its divisors is an integer number (8174768).

Almost surely, 2^51384212 is an apocalyptic number.

It is an amenable number.

51384212 is a deficient number, since it is larger than the sum of its proper divisors (46713004).

51384212 is a wasteful number, since it uses less digits than its factorization.

51384212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167838 (or 1167836 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 51384212 is about 7168.2781754059. The cubic root of 51384212 is about 371.7719051081.

It can be divided in two parts, 5 and 1384212, that multiplied together give a triangular number (6921060 = T₃₇₂₀).

The spelling of 51384212 in words is "fifty-one million, three hundred eighty-four thousand, two hundred twelve".