51485907 has 32 divisors (see below), whose sum is σ = 77702400. Its totient is φ = 30049920.

The previous prime is 51485897. The next prime is 51485909. The reversal of 51485907 is 70958415.

51485907 = T₃₃₇₈ + T₃₃₇₉ + ... + T₃₃₈₆.

51485907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51485907 - 2⁷ = 51485779 is a prime.

It is a super-2 number, since 2×51485907² = 5301597239225298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51485909) 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 31 ways as a sum of consecutive naturals, for example, 181788 + ... + 182070.

It is an arithmetic number, because the mean of its divisors is an integer number (2428200).

Almost surely, 2^51485907 is an apocalyptic number.

51485907 is a deficient number, since it is larger than the sum of its proper divisors (26216493).

51485907 is a wasteful number, since it uses less digits than its factorization.

51485907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 51485907 is about 7175.3680741827. The cubic root of 51485907 is about 372.0170026337.

The spelling of 51485907 in words is "fifty-one million, four hundred eighty-five thousand, nine hundred seven".