51115460 has 48 divisors (see below), whose sum is σ = 117657792. Its totient is φ = 18499200.

The previous prime is 51115457. The next prime is 51115469. The reversal of 51115460 is 6451115.

It is a super-2 number, since 2×51115460² = 5225580502023200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51115469) 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, 61850 + ... + 62670.

It is an arithmetic number, because the mean of its divisors is an integer number (2451204).

Almost surely, 2^51115460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51115460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58828896).

51115460 is an abundant number, since it is smaller than the sum of its proper divisors (66542332).

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

51115460 is a wasteful number, since it uses less digits than its factorization.

51115460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 51115460 is about 7149.5076753578. The cubic root of 51115460 is about 371.1226191413.

Adding to 51115460 its reverse (6451115), we get a palindrome (57566575).

It can be divided in two parts, 51 and 115460, that added together give a palindrome (115511).

The spelling of 51115460 in words is "fifty-one million, one hundred fifteen thousand, four hundred sixty".