51404530 has 16 divisors (see below), whose sum is σ = 95719320. Its totient is φ = 19852672.

The previous prime is 51404527. The next prime is 51404533. The reversal of 51404530 is 3540415.

51404530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51404527) and next prime (51404533).

It can be written as a sum of positive squares in 4 ways, for example, as 51165409 + 239121 = 7153^2 + 489^2 .

It is not an unprimeable number, because it can be changed into a prime (51404533) 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 7 ways as a sum of consecutive naturals, for example, 88339 + ... + 88918.

Almost surely, 2^51404530 is an apocalyptic number.

51404530 is a deficient number, since it is larger than the sum of its proper divisors (44314790).

51404530 is a wasteful number, since it uses less digits than its factorization.

51404530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177293.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51404530 is about 7169.6952515431. The cubic root of 51404530 is about 371.8208998342.

Adding to 51404530 its reverse (3540415), we get a palindrome (54944945).

The spelling of 51404530 in words is "fifty-one million, four hundred four thousand, five hundred thirty".