51457349 has 2 divisors, whose sum is σ = 51457350. Its totient is φ = 51457348.

The previous prime is 51457319. The next prime is 51457391. The reversal of 51457349 is 94375415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29084449 + 22372900 = 5393^2 + 4730^2 .

It is a cyclic number.

It is not a de Polignac number, because 51457349 - 2²⁰ = 50408773 is a prime.

It is a super-2 number, since 2×51457349² = 5295717532215602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51457319) 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, 25728674 + 25728675.

It is an arithmetic number, because the mean of its divisors is an integer number (25728675).

Almost surely, 2^51457349 is an apocalyptic number.

It is an amenable number.

51457349 is a deficient number, since it is larger than the sum of its proper divisors (1).

51457349 is an equidigital number, since it uses as much as digits as its factorization.

51457349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 51457349 is about 7173.3777957110. The cubic root of 51457349 is about 371.9482069373.

The spelling of 51457349 in words is "fifty-one million, four hundred fifty-seven thousand, three hundred forty-nine".