51962921 has 2 divisors, whose sum is σ = 51962922. Its totient is φ = 51962920.

The previous prime is 51962899. The next prime is 51962923. The reversal of 51962921 is 12926915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 12524521 = 6280^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 51962921 - 2⁶ = 51962857 is a prime.

Together with 51962923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51962923) 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, 25981460 + 25981461.

It is an arithmetic number, because the mean of its divisors is an integer number (25981461).

Almost surely, 2^51962921 is an apocalyptic number.

It is an amenable number.

51962921 is a deficient number, since it is larger than the sum of its proper divisors (1).

51962921 is an equidigital number, since it uses as much as digits as its factorization.

51962921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 51962921 is about 7208.5311263807. The cubic root of 51962921 is about 373.1623780603.

The spelling of 51962921 in words is "fifty-one million, nine hundred sixty-two thousand, nine hundred twenty-one".