51771145 has 8 divisors (see below), whose sum is σ = 62225856. Its totient is φ = 41349936.

The previous prime is 51771121. The next prime is 51771157. The reversal of 51771145 is 54117715.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51771145 - 2⁵ = 51771113 is a prime.

It is a super-2 number, since 2×51771145² = 5360502909222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4837 + ... + 11266.

It is an arithmetic number, because the mean of its divisors is an integer number (7778232).

Almost surely, 2^51771145 is an apocalyptic number.

It is an amenable number.

51771145 is a deficient number, since it is larger than the sum of its proper divisors (10454711).

51771145 is a wasteful number, since it uses less digits than its factorization.

51771145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16751.

The product of its digits is 4900, while the sum is 31.

The square root of 51771145 is about 7195.2168139675. The cubic root of 51771145 is about 372.7027438566.

The spelling of 51771145 in words is "fifty-one million, seven hundred seventy-one thousand, one hundred forty-five".