51017211 has 12 divisors (see below), whose sum is σ = 84218992. Its totient is φ = 29152656.

The previous prime is 51017189. The next prime is 51017233. The reversal of 51017211 is 11271015.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51017189) and next prime (51017233).

It is a de Polignac number, because none of the positive numbers 2^k-51017211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51017251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404836 + ... + 404961.

Almost surely, 2^51017211 is an apocalyptic number.

51017211 is a deficient number, since it is larger than the sum of its proper divisors (33201781).

51017211 is a wasteful number, since it uses less digits than its factorization.

51017211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809810 (or 809807 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 51017211 is about 7142.6333379224. The cubic root of 51017211 is about 370.8846884340.

Adding to 51017211 its reverse (11271015), we get a palindrome (62288226).

The spelling of 51017211 in words is "fifty-one million, seventeen thousand, two hundred eleven".