51490859 has 8 divisors (see below), whose sum is σ = 61405440. Its totient is φ = 42215976.

The previous prime is 51490843. The next prime is 51490883. The reversal of 51490859 is 95809415.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51490859 - 2⁴ = 51490843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51490259) 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 7 ways as a sum of consecutive naturals, for example, 159749 + ... + 160070.

It is an arithmetic number, because the mean of its divisors is an integer number (7675680).

Almost surely, 2^51490859 is an apocalyptic number.

51490859 is a deficient number, since it is larger than the sum of its proper divisors (9914581).

51490859 is a wasteful number, since it uses less digits than its factorization.

51490859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319849.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 51490859 is about 7175.7131352919. The cubic root of 51490859 is about 372.0289293222.

The spelling of 51490859 in words is "fifty-one million, four hundred ninety thousand, eight hundred fifty-nine".