51013187 has 2 divisors, whose sum is σ = 51013188. Its totient is φ = 51013186.

The previous prime is 51013169. The next prime is 51013201. The reversal of 51013187 is 78131015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51013187 - 2¹⁶ = 50947651 is a prime.

It is not a weakly prime, because it can be changed into another prime (51013087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25506593 + 25506594.

It is an arithmetic number, because the mean of its divisors is an integer number (25506594).

Almost surely, 2^51013187 is an apocalyptic number.

51013187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51013187 is an equidigital number, since it uses as much as digits as its factorization.

51013187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 51013187 is about 7142.3516435415. The cubic root of 51013187 is about 370.8749369587.

The spelling of 51013187 in words is "fifty-one million, thirteen thousand, one hundred eighty-seven".