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51031 is a prime number
BaseRepresentation
bin1100011101010111
32121000001
430131113
53113111
61032131
7301531
oct143527
977001
1051031
1135382
1225647
131a2c6
1414851
15101c1
hexc757

51031 has 2 divisors, whose sum is σ = 51032. Its totient is φ = 51030.

The previous prime is 51001. The next prime is 51043. The reversal of 51031 is 13015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51031 - 213 = 42839 is a prime.

It is a super-2 number, since 2×510312 = 5208325922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 50999 and 51017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515 + 25516.

It is an arithmetic number, because the mean of its divisors is an integer number (25516).

251031 is an apocalyptic number.

51031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031 is an equidigital number, since it uses as much as digits as its factorization.

51031 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 10.

The square root of 51031 is about 225.9004205397. The cubic root of 51031 is about 37.0918099827.

Adding to 51031 its reverse (13015), we get a palindrome (64046).

The spelling of 51031 in words is "fifty-one thousand, thirty-one".