51939259 has 2 divisors, whose sum is σ = 51939260. Its totient is φ = 51939258.

The previous prime is 51939187. The next prime is 51939287. The reversal of 51939259 is 95293915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51939259 - 2¹³ = 51931067 is a prime.

It is not a weakly prime, because it can be changed into another prime (51939299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25969629 + 25969630.

It is an arithmetic number, because the mean of its divisors is an integer number (25969630).

Almost surely, 2^51939259 is an apocalyptic number.

51939259 is a deficient number, since it is larger than the sum of its proper divisors (1).

51939259 is an equidigital number, since it uses as much as digits as its factorization.

51939259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 43.

The square root of 51939259 is about 7206.8896897344. The cubic root of 51939259 is about 373.1057279939.

The spelling of 51939259 in words is "fifty-one million, nine hundred thirty-nine thousand, two hundred fifty-nine".