51246630 has 48 divisors (see below), whose sum is σ = 134447040. Its totient is φ = 13542144.

The previous prime is 51246617. The next prime is 51246641. The reversal of 51246630 is 3664215.

51246630 is a `hidden beast` number, since 5 + 1 + 24 + 6 + 630 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51246594 and 51246603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7651 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^51246630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51246630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67223520).

51246630 is an abundant number, since it is smaller than the sum of its proper divisors (83200410).

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

51246630 is a wasteful number, since it uses less digits than its factorization.

51246630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165 (or 5162 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51246630 is about 7158.6751567591. The cubic root of 51246630 is about 371.4398002382.

The spelling of 51246630 in words is "fifty-one million, two hundred forty-six thousand, six hundred thirty".