51078031 has 2 divisors, whose sum is σ = 51078032. Its totient is φ = 51078030.

The previous prime is 51078017. The next prime is 51078037. The reversal of 51078031 is 13087015.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51078031 is a prime.

It is a super-2 number, since 2×51078031² = 5217930501673922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51077987 and 51078005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51078037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25539015 + 25539016.

It is an arithmetic number, because the mean of its divisors is an integer number (25539016).

Almost surely, 2^51078031 is an apocalyptic number.

51078031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51078031 is an equidigital number, since it uses as much as digits as its factorization.

51078031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 51078031 is about 7146.8896031770. The cubic root of 51078031 is about 371.0320128918.

The spelling of 51078031 in words is "fifty-one million, seventy-eight thousand, thirty-one".