50561385 has 24 divisors (see below), whose sum is σ = 94107456. Its totient is φ = 23113440.

The previous prime is 50561377. The next prime is 50561387. The reversal of 50561385 is 58316505.

It is not a de Polignac number, because 50561385 - 2³ = 50561377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50561387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33661 + ... + 35130.

It is an arithmetic number, because the mean of its divisors is an integer number (3921144).

Almost surely, 2^50561385 is an apocalyptic number.

It is an amenable number.

50561385 is a deficient number, since it is larger than the sum of its proper divisors (43546071).

50561385 is a wasteful number, since it uses less digits than its factorization.

50561385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68813 (or 68806 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 50561385 is about 7110.6529236069. The cubic root of 50561385 is about 369.7767950095.

It can be divided in two parts, 5056 and 1385, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 50561385 in words is "fifty million, five hundred sixty-one thousand, three hundred eighty-five".