51151571 has 2 divisors, whose sum is σ = 51151572. Its totient is φ = 51151570.

The previous prime is 51151567. The next prime is 51151601. The reversal of 51151571 is 17515115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51151571 - 2² = 51151567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51151571.

It is not a weakly prime, because it can be changed into another prime (51151531) 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, 25575785 + 25575786.

It is an arithmetic number, because the mean of its divisors is an integer number (25575786).

Almost surely, 2^51151571 is an apocalyptic number.

51151571 is a deficient number, since it is larger than the sum of its proper divisors (1).

51151571 is an equidigital number, since it uses as much as digits as its factorization.

51151571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 875, while the sum is 26.

The square root of 51151571 is about 7152.0326481358. The cubic root of 51151571 is about 371.2099929303.

Adding to 51151571 its reverse (17515115), we get a palindrome (68666686).

The spelling of 51151571 in words is "fifty-one million, one hundred fifty-one thousand, five hundred seventy-one".