51445445 has 8 divisors (see below), whose sum is σ = 64983840. Its totient is φ = 38990160.

The previous prime is 51445439. The next prime is 51445477. The reversal of 51445445 is 54454415.

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

It is not a de Polignac number, because 51445445 - 2²⁰ = 50396869 is a prime.

It is a super-2 number, since 2×51445445² = 5293267622496050, which contains 22 as substring.

It is a congruent 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, 270671 + ... + 270860.

It is an arithmetic number, because the mean of its divisors is an integer number (8122980).

Almost surely, 2^51445445 is an apocalyptic number.

It is an amenable number.

51445445 is a deficient number, since it is larger than the sum of its proper divisors (13538395).

51445445 is a wasteful number, since it uses less digits than its factorization.

51445445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541555.

The product of its digits is 32000, while the sum is 32.

The square root of 51445445 is about 7172.5480130843. The cubic root of 51445445 is about 371.9195229041.

The spelling of 51445445 in words is "fifty-one million, four hundred forty-five thousand, four hundred forty-five".