51126949 has 2 divisors, whose sum is σ = 51126950. Its totient is φ = 51126948.

The previous prime is 51126941. The next prime is 51126961. The reversal of 51126949 is 94962115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38750625 + 12376324 = 6225^2 + 3518^2 .

It is a cyclic number.

It is not a de Polignac number, because 51126949 - 2³ = 51126941 is a prime.

It is a super-2 number, since 2×51126949² = 5227929828097202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51126941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563474 + 25563475.

It is an arithmetic number, because the mean of its divisors is an integer number (25563475).

Almost surely, 2^51126949 is an apocalyptic number.

It is an amenable number.

51126949 is a deficient number, since it is larger than the sum of its proper divisors (1).

51126949 is an equidigital number, since it uses as much as digits as its factorization.

51126949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 51126949 is about 7150.3111121125. The cubic root of 51126949 is about 371.1504222649.

The spelling of 51126949 in words is "fifty-one million, one hundred twenty-six thousand, nine hundred forty-nine".