51145604 has 12 divisors (see below), whose sum is σ = 89605404. Its totient is φ = 25544064.

The previous prime is 51145603. The next prime is 51145607. The reversal of 51145604 is 40654115.

It can be written as a sum of positive squares in 2 ways, for example, as 20232004 + 30913600 = 4498^2 + 5560^2 .

It is not an unprimeable number, because it can be changed into a prime (51145603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2897 + ... + 10520.

It is an arithmetic number, because the mean of its divisors is an integer number (7467117).

Almost surely, 2^51145604 is an apocalyptic number.

It is an amenable number.

51145604 is a deficient number, since it is larger than the sum of its proper divisors (38459800).

51145604 is a wasteful number, since it uses less digits than its factorization.

51145604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14374 (or 14372 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51145604 is about 7151.6154818335. The cubic root of 51145604 is about 371.1955580777.

Adding to 51145604 its reverse (40654115), we get a palindrome (91799719).

The spelling of 51145604 in words is "fifty-one million, one hundred forty-five thousand, six hundred four".