51039750 has 32 divisors (see below), whose sum is σ = 127397088. Its totient is φ = 13610400.

The previous prime is 51039683. The next prime is 51039773. The reversal of 51039750 is 5793015.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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, 33277 + ... + 34776.

It is an arithmetic number, because the mean of its divisors is an integer number (3981159).

Almost surely, 2^51039750 is an apocalyptic number.

51039750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51039750 is an abundant number, since it is smaller than the sum of its proper divisors (76357338).

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

51039750 is a wasteful number, since it uses less digits than its factorization.

51039750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68073 (or 68063 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 51039750 is about 7144.2109431343. The cubic root of 51039750 is about 370.9392983660.

The spelling of 51039750 in words is "fifty-one million, thirty-nine thousand, seven hundred fifty".