51631211 has 2 divisors, whose sum is σ = 51631212. Its totient is φ = 51631210.

The previous prime is 51631183. The next prime is 51631219. The reversal of 51631211 is 11213615.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51631211 is a prime.

It is a Chen prime.

It is equal to p_3093050 and since 51631211 and 3093050 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51631219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815605 + 25815606.

It is an arithmetic number, because the mean of its divisors is an integer number (25815606).

Almost surely, 2^51631211 is an apocalyptic number.

51631211 is a deficient number, since it is larger than the sum of its proper divisors (1).

51631211 is an equidigital number, since it uses as much as digits as its factorization.

51631211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 51631211 is about 7185.4861352590. The cubic root of 51631211 is about 372.3666438543.

Adding to 51631211 its reverse (11213615), we get a palindrome (62844826).

The spelling of 51631211 in words is "fifty-one million, six hundred thirty-one thousand, two hundred eleven".