51490307 has 16 divisors (see below), whose sum is σ = 59989248. Its totient is φ = 43723680.

The previous prime is 51490267. The next prime is 51490321. The reversal of 51490307 is 70309415.

It is not a de Polignac number, because 51490307 - 2¹⁶ = 51424771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51490307.

It is not an unprimeable number, because it can be changed into a prime (51490357) 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, 8513 + ... + 13245.

It is an arithmetic number, because the mean of its divisors is an integer number (3749328).

Almost surely, 2^51490307 is an apocalyptic number.

51490307 is a deficient number, since it is larger than the sum of its proper divisors (8498941).

51490307 is a wasteful number, since it uses less digits than its factorization.

51490307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 51490307 is about 7175.6746721127. The cubic root of 51490307 is about 372.0275998908.

The spelling of 51490307 in words is "fifty-one million, four hundred ninety thousand, three hundred seven".