51618843 has 16 divisors (see below), whose sum is σ = 77335200. Its totient is φ = 34024320.

The previous prime is 51618821. The next prime is 51618863. The reversal of 51618843 is 34881615.

It is not a de Polignac number, because 51618843 - 2¹⁷ = 51487771 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51618798 and 51618807.

It is not an unprimeable number, because it can be changed into a prime (51618863) 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, 8338 + ... + 13143.

It is an arithmetic number, because the mean of its divisors is an integer number (4833450).

Almost surely, 2^51618843 is an apocalyptic number.

51618843 is a deficient number, since it is larger than the sum of its proper divisors (25716357).

51618843 is a wasteful number, since it uses less digits than its factorization.

51618843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21579 (or 21573 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 51618843 is about 7184.6254599666. The cubic root of 51618843 is about 372.3369086202.

The spelling of 51618843 in words is "fifty-one million, six hundred eighteen thousand, eight hundred forty-three".