51069764 has 24 divisors (see below), whose sum is σ = 92260728. Its totient is φ = 24719360.

The previous prime is 51069763. The next prime is 51069797. The reversal of 51069764 is 46796015.

It can be written as a sum of positive squares in 4 ways, for example, as 6980164 + 44089600 = 2642^2 + 6640^2 .

It is not an unprimeable number, because it can be changed into a prime (51069761) 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, 21332 + ... + 23604.

It is an arithmetic number, because the mean of its divisors is an integer number (3844197).

Almost surely, 2^51069764 is an apocalyptic number.

It is an amenable number.

51069764 is a deficient number, since it is larger than the sum of its proper divisors (41190964).

51069764 is a wasteful number, since it uses less digits than its factorization.

51069764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2453 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 51069764 is about 7146.3112162849. The cubic root of 51069764 is about 371.0119945846.

The spelling of 51069764 in words is "fifty-one million, sixty-nine thousand, seven hundred sixty-four".