51264740 has 12 divisors (see below), whose sum is σ = 107655996. Its totient is φ = 20505888.

The previous prime is 51264737. The next prime is 51264751. The reversal of 51264740 is 4746215.

51264740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40857664 + 10407076 = 6392^2 + 3226^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281599 + ... + 1281638.

It is an arithmetic number, because the mean of its divisors is an integer number (8971333).

Almost surely, 2^51264740 is an apocalyptic number.

It is an amenable number.

51264740 is an abundant number, since it is smaller than the sum of its proper divisors (56391256).

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

51264740 is a wasteful number, since it uses less digits than its factorization.

51264740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563246 (or 2563244 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 51264740 is about 7159.9399438822. The cubic root of 51264740 is about 371.4835493429.

The spelling of 51264740 in words is "fifty-one million, two hundred sixty-four thousand, seven hundred forty".