51945271 has 4 divisors (see below), whose sum is σ = 59366032. Its totient is φ = 44524512.

The previous prime is 51945241. The next prime is 51945281. The reversal of 51945271 is 17254915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51945271 - 2⁷ = 51945143 is a prime.

It is a super-2 number, since 2×51945271² = 5396622358526882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51945241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3710370 + ... + 3710383.

It is an arithmetic number, because the mean of its divisors is an integer number (14841508).

Almost surely, 2^51945271 is an apocalyptic number.

51945271 is a deficient number, since it is larger than the sum of its proper divisors (7420761).

51945271 is an equidigital number, since it uses as much as digits as its factorization.

51945271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420760.

The product of its digits is 12600, while the sum is 34.

The square root of 51945271 is about 7207.3067785408. The cubic root of 51945271 is about 373.1201231748.

The spelling of 51945271 in words is "fifty-one million, nine hundred forty-five thousand, two hundred seventy-one".