51100289 has 2 divisors, whose sum is σ = 51100290. Its totient is φ = 51100288.

The previous prime is 51100277. The next prime is 51100303. The reversal of 51100289 is 98200115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38850289 + 12250000 = 6233^2 + 3500^2 .

It is a cyclic number.

It is not a de Polignac number, because 51100289 - 2⁸ = 51100033 is a prime.

It is a super-2 number, since 2×51100289² = 5222479071767042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51100229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550144 + 25550145.

It is an arithmetic number, because the mean of its divisors is an integer number (25550145).

Almost surely, 2^51100289 is an apocalyptic number.

It is an amenable number.

51100289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51100289 is an equidigital number, since it uses as much as digits as its factorization.

51100289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 51100289 is about 7148.4466144751. The cubic root of 51100289 is about 371.0858992764.

The spelling of 51100289 in words is "fifty-one million, one hundred thousand, two hundred eighty-nine".