51867031 has 2 divisors, whose sum is σ = 51867032. Its totient is φ = 51867030.

The previous prime is 51866981. The next prime is 51867041. The reversal of 51867031 is 13076815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51867031 - 2⁹ = 51866519 is a prime.

It is a super-3 number, since 3×51867031³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 51866984 and 51867002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51867041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25933515 + 25933516.

It is an arithmetic number, because the mean of its divisors is an integer number (25933516).

Almost surely, 2^51867031 is an apocalyptic number.

51867031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51867031 is an equidigital number, since it uses as much as digits as its factorization.

51867031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 51867031 is about 7201.8769081400. The cubic root of 51867031 is about 372.9326977881.

The spelling of 51867031 in words is "fifty-one million, eight hundred sixty-seven thousand, thirty-one".