51949901 has 2 divisors, whose sum is σ = 51949902. Its totient is φ = 51949900.

The previous prime is 51949897. The next prime is 51949957. The reversal of 51949901 is 10994915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45549001 + 6400900 = 6749^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 51949901 - 2² = 51949897 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51949301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25974950 + 25974951.

It is an arithmetic number, because the mean of its divisors is an integer number (25974951).

Almost surely, 2^51949901 is an apocalyptic number.

It is an amenable number.

51949901 is a deficient number, since it is larger than the sum of its proper divisors (1).

51949901 is an equidigital number, since it uses as much as digits as its factorization.

51949901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 51949901 is about 7207.6279731962. The cubic root of 51949901 is about 373.1312085269.

The spelling of 51949901 in words is "fifty-one million, nine hundred forty-nine thousand, nine hundred one".