51220750 has 32 divisors (see below), whose sum is σ = 109586880. Its totient is φ = 17560800.

The previous prime is 51220739. The next prime is 51220759. The reversal of 51220750 is 5702215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12885 + ... + 16384.

It is an arithmetic number, because the mean of its divisors is an integer number (3424590).

Almost surely, 2^51220750 is an apocalyptic number.

51220750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51220750 is an abundant number, since it is smaller than the sum of its proper divisors (58366130).

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

51220750 is a wasteful number, since it uses less digits than its factorization.

51220750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29293 (or 29283 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 51220750 is about 7156.8673314517. The cubic root of 51220750 is about 371.3772629183.

Adding to 51220750 its reverse (5702215), we get a palindrome (56922965).

The spelling of 51220750 in words is "fifty-one million, two hundred twenty thousand, seven hundred fifty".