51654140 has 12 divisors (see below), whose sum is σ = 108473736. Its totient is φ = 20661648.

The previous prime is 51654121. The next prime is 51654151. The reversal of 51654140 is 4145615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291334 + ... + 1291373.

It is an arithmetic number, because the mean of its divisors is an integer number (9039478).

Almost surely, 2^51654140 is an apocalyptic number.

It is an amenable number.

51654140 is an abundant number, since it is smaller than the sum of its proper divisors (56819596).

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

51654140 is a wasteful number, since it uses less digits than its factorization.

51654140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582716 (or 2582714 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51654140 is about 7187.0814660751. The cubic root of 51654140 is about 372.4217573605.

Adding to 51654140 its reverse (4145615), we get a palindrome (55799755).

The spelling of 51654140 in words is "fifty-one million, six hundred fifty-four thousand, one hundred forty".