51154140 has 24 divisors (see below), whose sum is σ = 143231760. Its totient is φ = 13641088.

The previous prime is 51154111. The next prime is 51154157. The reversal of 51154140 is 4145115.

It is a congruent number.

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, 426225 + ... + 426344.

It is an arithmetic number, because the mean of its divisors is an integer number (5967990).

Almost surely, 2^51154140 is an apocalyptic number.

It is an amenable number.

51154140 is an abundant number, since it is smaller than the sum of its proper divisors (92077620).

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

51154140 is a wasteful number, since it uses less digits than its factorization.

51154140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852581 (or 852579 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 51154140 is about 7152.2122451728. The cubic root of 51154140 is about 371.2162072882.

Adding to 51154140 its reverse (4145115), we get a palindrome (55299255).

The spelling of 51154140 in words is "fifty-one million, one hundred fifty-four thousand, one hundred forty".