51650644 has 12 divisors (see below), whose sum is σ = 91049364. Its totient is φ = 25636544.

The previous prime is 51650633. The next prime is 51650659. The reversal of 51650644 is 44605615.

It can be written as a sum of positive squares in 2 ways, for example, as 45400644 + 6250000 = 6738^2 + 2500^2 .

It is a super-2 number, since 2×51650644² = 5335578051229472, which contains 22 as substring.

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, 46579 + ... + 47674.

It is an arithmetic number, because the mean of its divisors is an integer number (7587447).

Almost surely, 2^51650644 is an apocalyptic number.

It is an amenable number.

51650644 is a deficient number, since it is larger than the sum of its proper divisors (39398720).

51650644 is a wasteful number, since it uses less digits than its factorization.

51650644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94394 (or 94392 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 51650644 is about 7186.8382477971. The cubic root of 51650644 is about 372.4133552212.

The spelling of 51650644 in words is "fifty-one million, six hundred fifty thousand, six hundred forty-four".