51020829 has 12 divisors (see below), whose sum is σ = 74374300. Its totient is φ = 33701184.

The previous prime is 51020819. The next prime is 51020861. The reversal of 51020829 is 92802015.

It can be written as a sum of positive squares in 2 ways, for example, as 46172025 + 4848804 = 6795^2 + 2202^2 .

It is not a de Polignac number, because 51020829 - 2⁵ = 51020797 is a prime.

It is a Duffinian number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 25024 + ... + 26985.

Almost surely, 2^51020829 is an apocalyptic number.

It is an amenable number.

51020829 is a deficient number, since it is larger than the sum of its proper divisors (23353471).

51020829 is a wasteful number, since it uses less digits than its factorization.

51020829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52124 (or 52121 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51020829 is about 7142.8866013678. The cubic root of 51020829 is about 370.8934556001.

The spelling of 51020829 in words is "fifty-one million, twenty thousand, eight hundred twenty-nine".