51213011 has 2 divisors, whose sum is σ = 51213012. Its totient is φ = 51213010.

The previous prime is 51212989. The next prime is 51213031. The reversal of 51213011 is 11031215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51213011 - 2⁶ = 51212947 is a prime.

It is a super-2 number, since 2×51213011² = 5245544991372242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51213031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606505 + 25606506.

It is an arithmetic number, because the mean of its divisors is an integer number (25606506).

Almost surely, 2^51213011 is an apocalyptic number.

51213011 is a deficient number, since it is larger than the sum of its proper divisors (1).

51213011 is an equidigital number, since it uses as much as digits as its factorization.

51213011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 51213011 is about 7156.3266415110. The cubic root of 51213011 is about 371.3585580419.

Adding to 51213011 its reverse (11031215), we get a palindrome (62244226).

The spelling of 51213011 in words is "fifty-one million, two hundred thirteen thousand, eleven".