51371091 has 10 divisors (see below), whose sum is σ = 76739652. Its totient is φ = 34247340.

The previous prime is 51371083. The next prime is 51371129. The reversal of 51371091 is 19017315.

It is a happy number.

It is not a de Polignac number, because 51371091 - 2³ = 51371083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51371051) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 317025 + ... + 317186.

Almost surely, 2^51371091 is an apocalyptic number.

51371091 is a deficient number, since it is larger than the sum of its proper divisors (25368561).

51371091 is an equidigital number, since it uses as much as digits as its factorization.

51371091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634223 (or 634214 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 51371091 is about 7167.3629041650. The cubic root of 51371091 is about 371.7402583289.

The spelling of 51371091 in words is "fifty-one million, three hundred seventy-one thousand, ninety-one".