51306246 has 24 divisors (see below), whose sum is σ = 112988304. Its totient is φ = 16821360.

The previous prime is 51306239. The next prime is 51306247. The reversal of 51306246 is 64260315.

51306246 is a `hidden beast` number, since 5 + 1 + 30 + 624 + 6 = 666.

It is a super-2 number, since 2×51306246² = 5264661757225032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51306247) 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, 22266 + ... + 24461.

It is an arithmetic number, because the mean of its divisors is an integer number (4707846).

Almost surely, 2^51306246 is an apocalyptic number.

51306246 is an abundant number, since it is smaller than the sum of its proper divisors (61682058).

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

51306246 is a wasteful number, since it uses less digits than its factorization.

51306246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46796 (or 46793 counting only the distinct ones).

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

The square root of 51306246 is about 7162.8378454353. The cubic root of 51306246 is about 371.5837783167.

The spelling of 51306246 in words is "fifty-one million, three hundred six thousand, two hundred forty-six".