51650745 has 16 divisors (see below), whose sum is σ = 82821312. Its totient is φ = 27487040.

The previous prime is 51650737. The next prime is 51650761. The reversal of 51650745 is 54705615.

It is not a de Polignac number, because 51650745 - 2³ = 51650737 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (5176332).

Almost surely, 2^51650745 is an apocalyptic number.

It is an amenable number.

51650745 is a deficient number, since it is larger than the sum of its proper divisors (31170567).

51650745 is a wasteful number, since it uses less digits than its factorization.

51650745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7512.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 51650745 is about 7186.8452745276. The cubic root of 51650745 is about 372.4135979656.

The spelling of 51650745 in words is "fifty-one million, six hundred fifty thousand, seven hundred forty-five".