51231011 has 16 divisors (see below), whose sum is σ = 58410240. Its totient is φ = 44543520.

The previous prime is 51231007. The next prime is 51231073. The reversal of 51231011 is 11013215.

51231011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51231011 - 2² = 51231007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51231211) 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 15 ways as a sum of consecutive naturals, for example, 51626 + ... + 52608.

It is an arithmetic number, because the mean of its divisors is an integer number (3650640).

Almost surely, 2^51231011 is an apocalyptic number.

51231011 is a deficient number, since it is larger than the sum of its proper divisors (7179229).

51231011 is a wasteful number, since it uses less digits than its factorization.

51231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 51231011 is about 7157.5841594773. The cubic root of 51231011 is about 371.4020604704.

Adding to 51231011 its reverse (11013215), we get a palindrome (62244226).

The spelling of 51231011 in words is "fifty-one million, two hundred thirty-one thousand, eleven".