51070869 has 12 divisors (see below), whose sum is σ = 73897356. Its totient is φ = 33988032.

The previous prime is 51070861. The next prime is 51070883. The reversal of 51070869 is 96807015.

51070869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1199025 + 49871844 = 1095^2 + 7062^2 .

It is not a de Polignac number, because 51070869 - 2³ = 51070861 is a prime.

It is a super-2 number, since 2×51070869² = 5216467320830322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51070861) 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 11 ways as a sum of consecutive naturals, for example, 889 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (6158113).

Almost surely, 2^51070869 is an apocalyptic number.

It is an amenable number.

51070869 is a deficient number, since it is larger than the sum of its proper divisors (22826487).

51070869 is a wasteful number, since it uses less digits than its factorization.

51070869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876 (or 9873 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 51070869 is about 7146.3885284807. The cubic root of 51070869 is about 371.0146704360.

The spelling of 51070869 in words is "fifty-one million, seventy thousand, eight hundred sixty-nine".