51255133 has 2 divisors, whose sum is σ = 51255134. Its totient is φ = 51255132.

The previous prime is 51255053. The next prime is 51255137. The reversal of 51255133 is 33155215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27019204 + 24235929 = 5198^2 + 4923^2 .

It is a cyclic number.

It is not a de Polignac number, because 51255133 - 2¹³ = 51246941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51255098 and 51255107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51255137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25627566 + 25627567.

It is an arithmetic number, because the mean of its divisors is an integer number (25627567).

Almost surely, 2^51255133 is an apocalyptic number.

It is an amenable number.

51255133 is a deficient number, since it is larger than the sum of its proper divisors (1).

51255133 is an equidigital number, since it uses as much as digits as its factorization.

51255133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 25.

The square root of 51255133 is about 7159.2690269328. The cubic root of 51255133 is about 371.4603425838.

The spelling of 51255133 in words is "fifty-one million, two hundred fifty-five thousand, one hundred thirty-three".