51889645 has 8 divisors (see below), whose sum is σ = 63592704. Its totient is φ = 40628304.

The previous prime is 51889639. The next prime is 51889667. The reversal of 51889645 is 54698815.

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

It is not a de Polignac number, because 51889645 - 2¹⁵ = 51856877 is a prime.

It is a super-3 number, since 3×51889645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51889595 and 51889604.

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, 110169 + ... + 110638.

It is an arithmetic number, because the mean of its divisors is an integer number (7949088).

Almost surely, 2^51889645 is an apocalyptic number.

It is an amenable number.

51889645 is a deficient number, since it is larger than the sum of its proper divisors (11703059).

51889645 is a wasteful number, since it uses less digits than its factorization.

51889645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220859.

The product of its digits is 345600, while the sum is 46.

The square root of 51889645 is about 7203.4467444412. The cubic root of 51889645 is about 372.9868894040.

The spelling of 51889645 in words is "fifty-one million, eight hundred eighty-nine thousand, six hundred forty-five".