51229699 has 2 divisors, whose sum is σ = 51229700. Its totient is φ = 51229698.

The previous prime is 51229693. The next prime is 51229723. The reversal of 51229699 is 99692215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51229699 - 2¹³ = 51221507 is a prime.

It is not a weakly prime, because it can be changed into another prime (51229693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25614849 + 25614850.

It is an arithmetic number, because the mean of its divisors is an integer number (25614850).

Almost surely, 2^51229699 is an apocalyptic number.

51229699 is a deficient number, since it is larger than the sum of its proper divisors (1).

51229699 is an equidigital number, since it uses as much as digits as its factorization.

51229699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 51229699 is about 7157.4925078550. The cubic root of 51229699 is about 371.3988899711.

The spelling of 51229699 in words is "fifty-one million, two hundred twenty-nine thousand, six hundred ninety-nine".