51020849 has 8 divisors (see below), whose sum is σ = 55752192. Its totient is φ = 46305040.

The previous prime is 51020819. The next prime is 51020861. The reversal of 51020849 is 94802015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51020849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51020819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3632 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (6969024).

Almost surely, 2^51020849 is an apocalyptic number.

It is an amenable number.

51020849 is a deficient number, since it is larger than the sum of its proper divisors (4731343).

51020849 is a wasteful number, since it uses less digits than its factorization.

51020849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7767.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 51020849 is about 7142.8880013619. Note that the first 3 decimals coincide. The cubic root of 51020849 is about 370.8935040631.

The spelling of 51020849 in words is "fifty-one million, twenty thousand, eight hundred forty-nine".