51282213 has 4 divisors (see below), whose sum is σ = 68376288. Its totient is φ = 34188140.

The previous prime is 51282199. The next prime is 51282221. The reversal of 51282213 is 31228215.

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 a cyclic number.

It is not a de Polignac number, because 51282213 - 2⁵ = 51282181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51282113) 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, 8547033 + ... + 8547038.

It is an arithmetic number, because the mean of its divisors is an integer number (17094072).

Almost surely, 2^51282213 is an apocalyptic number.

It is an amenable number.

51282213 is a deficient number, since it is larger than the sum of its proper divisors (17094075).

51282213 is a wasteful number, since it uses less digits than its factorization.

51282213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094074.

The product of its digits is 960, while the sum is 24.

The square root of 51282213 is about 7161.1600317267. The cubic root of 51282213 is about 371.5257498544.

The spelling of 51282213 in words is "fifty-one million, two hundred eighty-two thousand, two hundred thirteen".