51152569 has 4 divisors (see below), whose sum is σ = 55087396. Its totient is φ = 47217744.

The previous prime is 51152567. The next prime is 51152593. The reversal of 51152569 is 96525115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3196944 + 47955625 = 1788^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 51152569 - 2¹ = 51152567 is a prime.

It is a super-2 number, since 2×51152569² = 5233170630599522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51152567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967394 + ... + 1967419.

It is an arithmetic number, because the mean of its divisors is an integer number (13771849).

Almost surely, 2^51152569 is an apocalyptic number.

It is an amenable number.

51152569 is a deficient number, since it is larger than the sum of its proper divisors (3934827).

51152569 is a wasteful number, since it uses less digits than its factorization.

51152569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934826.

The product of its digits is 13500, while the sum is 34.

The square root of 51152569 is about 7152.1024181705. The cubic root of 51152569 is about 371.2124070964.

The spelling of 51152569 in words is "fifty-one million, one hundred fifty-two thousand, five hundred sixty-nine".