51498689 has 6 divisors (see below), whose sum is σ = 56606130. Its totient is φ = 46816880.

The previous prime is 51498677. The next prime is 51498691. The reversal of 51498689 is 98689415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 4986289 = 6820^2 + 2233^2 .

It is not a de Polignac number, because 51498689 - 2⁴ = 51498673 is a prime.

It is a super-2 number, since 2×51498689² = 5304229937437442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51498619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212684 + ... + 212925.

It is an arithmetic number, because the mean of its divisors is an integer number (9434355).

Almost surely, 2^51498689 is an apocalyptic number.

It is an amenable number.

51498689 is a deficient number, since it is larger than the sum of its proper divisors (5107441).

51498689 is a wasteful number, since it uses less digits than its factorization.

51498689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425631 (or 425620 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 51498689 is about 7176.2587049242. The cubic root of 51498689 is about 372.0477859953.

The spelling of 51498689 in words is "fifty-one million, four hundred ninety-eight thousand, six hundred eighty-nine".