51005213 has 8 divisors (see below), whose sum is σ = 58598400. Its totient is φ = 43488720.

The previous prime is 51005209. The next prime is 51005249. The reversal of 51005213 is 31250015.

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

It is a cyclic number.

It is not a de Polignac number, because 51005213 - 2² = 51005209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51005191 and 51005200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005263) 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, 17738 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (7324800).

Almost surely, 2^51005213 is an apocalyptic number.

It is an amenable number.

51005213 is a deficient number, since it is larger than the sum of its proper divisors (7593187).

51005213 is a wasteful number, since it uses less digits than its factorization.

51005213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38347.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 51005213 is about 7141.7934022205. The cubic root of 51005213 is about 370.8556118193.

Adding to 51005213 its reverse (31250015), we get a palindrome (82255228).

The spelling of 51005213 in words is "fifty-one million, five thousand, two hundred thirteen".