51445091 has 2 divisors, whose sum is σ = 51445092. Its totient is φ = 51445090.

The previous prime is 51445067. The next prime is 51445117. The reversal of 51445091 is 19054415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51445091 - 2¹⁰ = 51444067 is a prime.

It is a super-3 number, since 3×51445091³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (51445591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722545 + 25722546.

It is an arithmetic number, because the mean of its divisors is an integer number (25722546).

Almost surely, 2^51445091 is an apocalyptic number.

51445091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51445091 is an equidigital number, since it uses as much as digits as its factorization.

51445091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51445091 is about 7172.5233356191. The cubic root of 51445091 is about 371.9186698333.

The spelling of 51445091 in words is "fifty-one million, four hundred forty-five thousand, ninety-one".