51026540 has 24 divisors (see below), whose sum is σ = 107881200. Its totient is φ = 20272448.

The previous prime is 51026531. The next prime is 51026557. The reversal of 51026540 is 4562015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5582 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (4495050).

Almost surely, 2^51026540 is an apocalyptic number.

It is an amenable number.

51026540 is an abundant number, since it is smaller than the sum of its proper divisors (56854660).

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

51026540 is a wasteful number, since it uses less digits than its factorization.

51026540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17281 (or 17279 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51026540 is about 7143.2863585327. The cubic root of 51026540 is about 370.9072936968.

Adding to 51026540 its reverse (4562015), we get a palindrome (55588555).

The spelling of 51026540 in words is "fifty-one million, twenty-six thousand, five hundred forty".