51901933 has 2 divisors, whose sum is σ = 51901934. Its totient is φ = 51901932.

The previous prime is 51901919. The next prime is 51901963. The reversal of 51901933 is 33910915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46416969 + 5484964 = 6813^2 + 2342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51901933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51901895 and 51901904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51901963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950966 + 25950967.

It is an arithmetic number, because the mean of its divisors is an integer number (25950967).

Almost surely, 2^51901933 is an apocalyptic number.

It is an amenable number.

51901933 is a deficient number, since it is larger than the sum of its proper divisors (1).

51901933 is an equidigital number, since it uses as much as digits as its factorization.

51901933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 51901933 is about 7204.2996189775. The cubic root of 51901933 is about 373.0163294535.

The spelling of 51901933 in words is "fifty-one million, nine hundred one thousand, nine hundred thirty-three".