51677540 has 12 divisors (see below), whose sum is σ = 108522876. Its totient is φ = 20671008.

The previous prime is 51677539. The next prime is 51677551. The reversal of 51677540 is 4577615.

It can be written as a sum of positive squares in 2 ways, for example, as 5654884 + 46022656 = 2378^2 + 6784^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51677540.

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, 1291919 + ... + 1291958.

It is an arithmetic number, because the mean of its divisors is an integer number (9043573).

Almost surely, 2^51677540 is an apocalyptic number.

It is an amenable number.

51677540 is an abundant number, since it is smaller than the sum of its proper divisors (56845336).

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

51677540 is a wasteful number, since it uses less digits than its factorization.

51677540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583886 (or 2583884 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 51677540 is about 7188.7092026316. The cubic root of 51677540 is about 372.4779861771.

The spelling of 51677540 in words is "fifty-one million, six hundred seventy-seven thousand, five hundred forty".