51073091 has 2 divisors, whose sum is σ = 51073092. Its totient is φ = 51073090.

The previous prime is 51073081. The next prime is 51073097. The reversal of 51073091 is 19037015.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51073091 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51073091.

It is not a weakly prime, because it can be changed into another prime (51073097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25536545 + 25536546.

It is an arithmetic number, because the mean of its divisors is an integer number (25536546).

Almost surely, 2^51073091 is an apocalyptic number.

51073091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51073091 is an equidigital number, since it uses as much as digits as its factorization.

51073091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 51073091 is about 7146.5439899297. The cubic root of 51073091 is about 371.0200510810.

The spelling of 51073091 in words is "fifty-one million, seventy-three thousand, ninety-one".