51380039 has 2 divisors, whose sum is σ = 51380040. Its totient is φ = 51380038.

The previous prime is 51380033. The next prime is 51380057. The reversal of 51380039 is 93008315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51380039 - 2⁴ = 51380023 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51379993 and 51380020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51380033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690019 + 25690020.

It is an arithmetic number, because the mean of its divisors is an integer number (25690020).

Almost surely, 2^51380039 is an apocalyptic number.

51380039 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380039 is an equidigital number, since it uses as much as digits as its factorization.

51380039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 51380039 is about 7167.9870954125. The cubic root of 51380039 is about 371.7618407576.

The spelling of 51380039 in words is "fifty-one million, three hundred eighty thousand, thirty-nine".