51939101 has 2 divisors, whose sum is σ = 51939102. Its totient is φ = 51939100.

The previous prime is 51939079. The next prime is 51939119. The reversal of 51939101 is 10193915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47251876 + 4687225 = 6874^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 51939101 - 2²² = 47744797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51939161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25969550 + 25969551.

It is an arithmetic number, because the mean of its divisors is an integer number (25969551).

Almost surely, 2^51939101 is an apocalyptic number.

It is an amenable number.

51939101 is a deficient number, since it is larger than the sum of its proper divisors (1).

51939101 is an equidigital number, since it uses as much as digits as its factorization.

51939101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 51939101 is about 7206.8787279931. The cubic root of 51939101 is about 373.1053496624.

The spelling of 51939101 in words is "fifty-one million, nine hundred thirty-nine thousand, one hundred one".