51031005311 has 32 divisors (see below), whose sum is σ = 60395182848. Its totient is φ = 42508247040.

The previous prime is 51031005307. The next prime is 51031005317. The reversal of 51031005311 is 11350013015.

It is a cyclic number.

It is not a de Polignac number, because 51031005311 - 2² = 51031005307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031005317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11280296 + ... + 11284818.

It is an arithmetic number, because the mean of its divisors is an integer number (1887349464).

Almost surely, 2^51031005311 is an apocalyptic number.

51031005311 is a deficient number, since it is larger than the sum of its proper divisors (9364177537).

51031005311 is a wasteful number, since it uses less digits than its factorization.

51031005311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111.

The product of its (nonzero) digits is 225, while the sum is 20.

Adding to 51031005311 its reverse (11350013015), we get a palindrome (62381018326).

The spelling of 51031005311 in words is "fifty-one billion, thirty-one million, five thousand, three hundred eleven".