51247350 has 384 divisors, whose sum is σ = 192844800. Its totient is φ = 9676800.

The previous prime is 51247349. The next prime is 51247373. The reversal of 51247350 is 5374215.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1767136 + ... + 1767164.

It is an arithmetic number, because the mean of its divisors is an integer number (502200).

Almost surely, 2^51247350 is an apocalyptic number.

51247350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51247350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96422400).

51247350 is an abundant number, since it is smaller than the sum of its proper divisors (141597450).

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

51247350 is a wasteful number, since it uses less digits than its factorization.

51247350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 51247350 is about 7158.7254452172. The cubic root of 51247350 is about 371.4415397698.

The spelling of 51247350 in words is "fifty-one million, two hundred forty-seven thousand, three hundred fifty".