51250806 has 20 divisors (see below), whose sum is σ = 114840132. Its totient is φ = 17083548.

The previous prime is 51250783. The next prime is 51250807. The reversal of 51250806 is 60805215.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51250806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51250807) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 158020 + ... + 158343.

Almost surely, 2^51250806 is an apocalyptic number.

51250806 is an abundant number, since it is smaller than the sum of its proper divisors (63589326).

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

51250806 is a wasteful number, since it uses less digits than its factorization.

51250806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316377 (or 316368 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51250806 is about 7158.9668248987. The cubic root of 51250806 is about 371.4498892949.

The spelling of 51250806 in words is "fifty-one million, two hundred fifty thousand, eight hundred six".