51143022 has 64 divisors (see below), whose sum is σ = 136742400. Its totient is φ = 13841280.

The previous prime is 51143011. The next prime is 51143033. The reversal of 51143022 is 22034115.

It is an interprime number because it is at equal distance from previous prime (51143011) and next prime (51143033).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51142986 and 51143004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3622 + ... + 10742.

It is an arithmetic number, because the mean of its divisors is an integer number (2136600).

Almost surely, 2^51143022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51143022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68371200).

51143022 is an abundant number, since it is smaller than the sum of its proper divisors (85599378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51143022 is a wasteful number, since it uses less digits than its factorization.

51143022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158 (or 7152 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51143022 is about 7151.4349609012. The cubic root of 51143022 is about 371.1893115776.

Adding to 51143022 its reverse (22034115), we get a palindrome (73177137).

The spelling of 51143022 in words is "fifty-one million, one hundred forty-three thousand, twenty-two".