51414140 has 24 divisors (see below), whose sum is σ = 108170160. Its totient is φ = 20527488.

The previous prime is 51414113. The next prime is 51414161. The reversal of 51414140 is 4141415.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 10304 + ... + 14456.

It is an arithmetic number, because the mean of its divisors is an integer number (4507090).

Almost surely, 2^51414140 is an apocalyptic number.

It is an amenable number.

51414140 is an abundant number, since it is smaller than the sum of its proper divisors (56756020).

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

51414140 is a wasteful number, since it uses less digits than its factorization.

51414140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781 (or 4779 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 51414140 is about 7170.3654021256. The cubic root of 51414140 is about 371.8440688441.

Adding to 51414140 its reverse (4141415), we get a palindrome (55555555).

The spelling of 51414140 in words is "fifty-one million, four hundred fourteen thousand, one hundred forty".