51012011 has 4 divisors (see below), whose sum is σ = 52390752. Its totient is φ = 49633272.

The previous prime is 51012007. The next prime is 51012029. The reversal of 51012011 is 11021015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51012011 - 2² = 51012007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51011983 and 51012001.

It is not an unprimeable number, because it can be changed into a prime (51012001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689315 + ... + 689388.

It is an arithmetic number, because the mean of its divisors is an integer number (13097688).

Almost surely, 2^51012011 is an apocalyptic number.

51012011 is a deficient number, since it is larger than the sum of its proper divisors (1378741).

51012011 is a wasteful number, since it uses less digits than its factorization.

51012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378740.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 51012011 is about 7142.2693172408. The cubic root of 51012011 is about 370.8720870271.

Adding to 51012011 its reverse (11021015), we get a palindrome (62033026).

It can be divided in two parts, 510 and 12011, that added together give a palindrome (12521).

The spelling of 51012011 in words is "fifty-one million, twelve thousand, eleven".