51261850 has 24 divisors (see below), whose sum is σ = 98637660. Its totient is φ = 19797120.

The previous prime is 51261839. The next prime is 51261857. The reversal of 51261850 is 5816215.

It can be written as a sum of positive squares in 6 ways, for example, as 37785609 + 13476241 = 6147^2 + 3671^2 .

It is not an unprimeable number, because it can be changed into a prime (51261857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16227 + ... + 19126.

Almost surely, 2^51261850 is an apocalyptic number.

51261850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51261850 is a deficient number, since it is larger than the sum of its proper divisors (47375810).

51261850 is a wasteful number, since it uses less digits than its factorization.

51261850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35394 (or 35389 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 51261850 is about 7159.7381237026. The cubic root of 51261850 is about 371.4765685368.

The spelling of 51261850 in words is "fifty-one million, two hundred sixty-one thousand, eight hundred fifty".