51497197 has 2 divisors, whose sum is σ = 51497198. Its totient is φ = 51497196.

The previous prime is 51497183. The next prime is 51497213. The reversal of 51497197 is 79179415.

51497197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43283241 + 8213956 = 6579^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 51497197 - 2¹⁵ = 51464429 is a prime.

It is a super-2 number, since 2×51497197² = 5303922597713618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51497497) 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 as a sum of consecutive naturals, namely, 25748598 + 25748599.

It is an arithmetic number, because the mean of its divisors is an integer number (25748599).

Almost surely, 2^51497197 is an apocalyptic number.

It is an amenable number.

51497197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51497197 is an equidigital number, since it uses as much as digits as its factorization.

51497197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 51497197 is about 7176.1547502824. The cubic root of 51497197 is about 372.0441930193.

The spelling of 51497197 in words is "fifty-one million, four hundred ninety-seven thousand, one hundred ninety-seven".