51118803 has 8 divisors (see below), whose sum is σ = 75731600. Its totient is φ = 34079184.

The previous prime is 51118777. The next prime is 51118807. The reversal of 51118803 is 30881115.

It is not a de Polignac number, because 51118803 - 2¹⁰ = 51117779 is a prime.

It is a super-2 number, since 2×51118803² = 5226264040305618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1893289 = 51118803 / (5 + 1 + 1 + 1 + 8 + 8 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51118807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946618 + ... + 946671.

It is an arithmetic number, because the mean of its divisors is an integer number (9466450).

Almost surely, 2^51118803 is an apocalyptic number.

51118803 is a deficient number, since it is larger than the sum of its proper divisors (24612797).

51118803 is a wasteful number, since it uses less digits than its factorization.

51118803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893298 (or 1893292 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 51118803 is about 7149.7414638573. The cubic root of 51118803 is about 371.1307095564.

Adding to 51118803 its reverse (30881115), we get a palindrome (81999918).

The spelling of 51118803 in words is "fifty-one million, one hundred eighteen thousand, eight hundred three".