51152405 has 16 divisors (see below), whose sum is σ = 65161584. Its totient is φ = 38415360.

The previous prime is 51152401. The next prime is 51152443. The reversal of 51152405 is 50425115.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3845521 + 47306884 = 1961^2 + 6878^2 .

It is not a de Polignac number, because 51152405 - 2² = 51152401 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 (51152401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61895 + ... + 62715.

It is an arithmetic number, because the mean of its divisors is an integer number (4072599).

Almost surely, 2^51152405 is an apocalyptic number.

It is an amenable number.

51152405 is a deficient number, since it is larger than the sum of its proper divisors (14009179).

51152405 is a wasteful number, since it uses less digits than its factorization.

51152405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51152405 is about 7152.0909530011. The cubic root of 51152405 is about 371.2120103818.

The spelling of 51152405 in words is "fifty-one million, one hundred fifty-two thousand, four hundred five".