51677240 has 16 divisors (see below), whose sum is σ = 116273880. Its totient is φ = 20670880.

The previous prime is 51677221. The next prime is 51677257. The reversal of 51677240 is 4277615.

It is a junction number, because it is equal to n+sod(n) for n = 51677197 and 51677206.

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, 645926 + ... + 646005.

Almost surely, 2^51677240 is an apocalyptic number.

It is an amenable number.

51677240 is an abundant number, since it is smaller than the sum of its proper divisors (64596640).

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

51677240 is a wasteful number, since it uses less digits than its factorization.

51677240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291942 (or 1291938 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 51677240 is about 7188.6883365465. The cubic root of 51677240 is about 372.4772654023.

The spelling of 51677240 in words is "fifty-one million, six hundred seventy-seven thousand, two hundred forty".