51993311 has 2 divisors, whose sum is σ = 51993312. Its totient is φ = 51993310.

The previous prime is 51993299. The next prime is 51993313. The reversal of 51993311 is 11339915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51993311 - 2¹⁴ = 51976927 is a prime.

Together with 51993313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51993313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25996655 + 25996656.

It is an arithmetic number, because the mean of its divisors is an integer number (25996656).

Almost surely, 2^51993311 is an apocalyptic number.

51993311 is a deficient number, since it is larger than the sum of its proper divisors (1).

51993311 is an equidigital number, since it uses as much as digits as its factorization.

51993311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645, while the sum is 32.

The square root of 51993311 is about 7210.6387373103. The cubic root of 51993311 is about 373.2351106575.

The spelling of 51993311 in words is "fifty-one million, nine hundred ninety-three thousand, three hundred eleven".