51106840 has 32 divisors (see below), whose sum is σ = 117164880. Its totient is φ = 20056192.

The previous prime is 51106829. The next prime is 51106871. The reversal of 51106840 is 4860115.

It is a super-2 number, since 2×51106840² = 5223818189571200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9934 + ... + 14173.

Almost surely, 2^51106840 is an apocalyptic number.

It is an amenable number.

51106840 is an abundant number, since it is smaller than the sum of its proper divisors (66058040).

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

51106840 is a wasteful number, since it uses less digits than its factorization.

51106840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24171 (or 24167 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 51106840 is about 7148.9048112281. The cubic root of 51106840 is about 371.1017561981.

Adding to 51106840 its reverse (4860115), we get a palindrome (55966955).

The spelling of 51106840 in words is "fifty-one million, one hundred six thousand, eight hundred forty".