51001011 has 12 divisors (see below), whose sum is σ = 74056320. Its totient is φ = 33821520.

The previous prime is 51001009. The next prime is 51001031. The reversal of 51001011 is 11010015.

51001011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51001011 - 2¹ = 51001009 is a prime.

It is a super-2 number, since 2×51001011² = 5202206246044242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 51000984 and 51001002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001001) 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 11 ways as a sum of consecutive naturals, for example, 13116 + ... + 16553.

It is an arithmetic number, because the mean of its divisors is an integer number (6171360).

Almost surely, 2^51001011 is an apocalyptic number.

51001011 is a deficient number, since it is larger than the sum of its proper divisors (23055309).

51001011 is a wasteful number, since it uses less digits than its factorization.

51001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29866 (or 29863 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 51001011 is about 7141.4992123503. The cubic root of 51001011 is about 370.8454273826.

Adding to 51001011 its reverse (11010015), we get a palindrome (62011026).

The spelling of 51001011 in words is "fifty-one million, one thousand, eleven".