51245705 has 8 divisors (see below), whose sum is σ = 70279872. Its totient is φ = 35139888.

The previous prime is 51245659. The next prime is 51245707. The reversal of 51245705 is 50754215.

51245705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51245705 is a prime.

It is a super-2 number, since 2×51245705² = 5252244561894050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51245707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732047 + ... + 732116.

It is an arithmetic number, because the mean of its divisors is an integer number (8784984).

Almost surely, 2^51245705 is an apocalyptic number.

It is an amenable number.

51245705 is a deficient number, since it is larger than the sum of its proper divisors (19034167).

51245705 is a wasteful number, since it uses less digits than its factorization.

51245705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464175.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 51245705 is about 7158.6105495410. The cubic root of 51245705 is about 371.4375653993.

The spelling of 51245705 in words is "fifty-one million, two hundred forty-five thousand, seven hundred five".