51869711 has 2 divisors, whose sum is σ = 51869712. Its totient is φ = 51869710.

The previous prime is 51869687. The next prime is 51869729. The reversal of 51869711 is 11796815.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51869711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51869011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25934855 + 25934856.

It is an arithmetic number, because the mean of its divisors is an integer number (25934856).

Almost surely, 2^51869711 is an apocalyptic number.

51869711 is a deficient number, since it is larger than the sum of its proper divisors (1).

51869711 is an equidigital number, since it uses as much as digits as its factorization.

51869711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 38.

The square root of 51869711 is about 7202.0629683446. The cubic root of 51869711 is about 372.9391208948.

The spelling of 51869711 in words is "fifty-one million, eight hundred sixty-nine thousand, seven hundred eleven".