51011131 has 2 divisors, whose sum is σ = 51011132. Its totient is φ = 51011130.

The previous prime is 51011117. The next prime is 51011141. The reversal of 51011131 is 13111015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51011131 - 2¹¹ = 51009083 is a prime.

It is a super-2 number, since 2×51011131² = 5204270971798322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51011141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505565 + 25505566.

It is an arithmetic number, because the mean of its divisors is an integer number (25505566).

Almost surely, 2^51011131 is an apocalyptic number.

51011131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51011131 is an equidigital number, since it uses as much as digits as its factorization.

51011131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15, while the sum is 13.

The square root of 51011131 is about 7142.2077119053. The cubic root of 51011131 is about 370.8699543966.

Adding to 51011131 its reverse (13111015), we get a palindrome (64122146).

The spelling of 51011131 in words is "fifty-one million, eleven thousand, one hundred thirty-one".