51498889 has 4 divisors (see below), whose sum is σ = 55460356. Its totient is φ = 47537424.

The previous prime is 51498877. The next prime is 51498913. The reversal of 51498889 is 98889415.

51498889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98889415 = 5 ⋅19777883.

It can be written as a sum of positive squares in 2 ways, for example, as 5326864 + 46172025 = 2308^2 + 6795^2 .

It is a cyclic number.

It is not a de Polignac number, because 51498889 - 2¹³ = 51490697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51498089) 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 3 ways as a sum of consecutive naturals, for example, 1980714 + ... + 1980739.

It is an arithmetic number, because the mean of its divisors is an integer number (13865089).

Almost surely, 2^51498889 is an apocalyptic number.

It is an amenable number.

51498889 is a deficient number, since it is larger than the sum of its proper divisors (3961467).

51498889 is a wasteful number, since it uses less digits than its factorization.

51498889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961466.

The product of its digits is 829440, while the sum is 52.

The square root of 51498889 is about 7176.2726397483. The cubic root of 51498889 is about 372.0482676222.

The spelling of 51498889 in words is "fifty-one million, four hundred ninety-eight thousand, eight hundred eighty-nine".