51497811 has 12 divisors (see below), whose sum is σ = 78761592. Its totient is φ = 32312256.

The previous prime is 51497801. The next prime is 51497819. The reversal of 51497811 is 11879415.

51497811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51497811 - 2⁷ = 51497683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51497819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168141 + ... + 168446.

It is an arithmetic number, because the mean of its divisors is an integer number (6563466).

Almost surely, 2^51497811 is an apocalyptic number.

51497811 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51497811 is a deficient number, since it is larger than the sum of its proper divisors (27263781).

51497811 is a wasteful number, since it uses less digits than its factorization.

51497811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336610 (or 336607 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 51497811 is about 7176.1975307261. The cubic root of 51497811 is about 372.0456716384.

The spelling of 51497811 in words is "fifty-one million, four hundred ninety-seven thousand, eight hundred eleven".