51553211 has 2 divisors, whose sum is σ = 51553212. Its totient is φ = 51553210.

The previous prime is 51553193. The next prime is 51553283. The reversal of 51553211 is 11235515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51553211 - 2⁶ = 51553147 is a prime.

It is not a weakly prime, because it can be changed into another prime (51558211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25776605 + 25776606.

It is an arithmetic number, because the mean of its divisors is an integer number (25776606).

Almost surely, 2^51553211 is an apocalyptic number.

51553211 is a deficient number, since it is larger than the sum of its proper divisors (1).

51553211 is an equidigital number, since it uses as much as digits as its factorization.

51553211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 23.

The square root of 51553211 is about 7180.0564761010. The cubic root of 51553211 is about 372.1790361652.

Adding to 51553211 its reverse (11235515), we get a palindrome (62788726).

The spelling of 51553211 in words is "fifty-one million, five hundred fifty-three thousand, two hundred eleven".