51851541 has 16 divisors (see below), whose sum is σ = 81148544. Its totient is φ = 28828224.

The previous prime is 51851533. The next prime is 51851557. The reversal of 51851541 is 14515815.

It is not a de Polignac number, because 51851541 - 2³ = 51851533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51851499 and 51851508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51851521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32590 + ... + 34143.

It is an arithmetic number, because the mean of its divisors is an integer number (5071784).

Almost surely, 2^51851541 is an apocalyptic number.

It is an amenable number.

51851541 is a deficient number, since it is larger than the sum of its proper divisors (29297003).

51851541 is a wasteful number, since it uses less digits than its factorization.

51851541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66780.

The product of its digits is 4000, while the sum is 30.

The square root of 51851541 is about 7200.8014137317. The cubic root of 51851541 is about 372.8955688545.

The spelling of 51851541 in words is "fifty-one million, eight hundred fifty-one thousand, five hundred forty-one".