51530061 has 16 divisors (see below), whose sum is σ = 75233088. Its totient is φ = 31113600.

The previous prime is 51530057. The next prime is 51530107. The reversal of 51530061 is 16003515.

It is a happy number.

It is not a de Polignac number, because 51530061 - 2² = 51530057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51530161) 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 15 ways as a sum of consecutive naturals, for example, 6495 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (4702068).

Almost surely, 2^51530061 is an apocalyptic number.

It is an amenable number.

51530061 is a deficient number, since it is larger than the sum of its proper divisors (23703027).

51530061 is a wasteful number, since it uses less digits than its factorization.

51530061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 51530061 is about 7178.4441907700. Note that the first 3 decimals coincide. The cubic root of 51530061 is about 372.1233187520.

Adding to 51530061 its reverse (16003515), we get a palindrome (67533576).

The spelling of 51530061 in words is "fifty-one million, five hundred thirty thousand, sixty-one".