851103553 has 2 divisors, whose sum is σ = 851103554. Its totient is φ = 851103552.

The previous prime is 851103551. The next prime is 851103557. The reversal of 851103553 is 355301158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851005584 + 97969 = 29172^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 851103553 - 2¹ = 851103551 is a prime.

Together with 851103551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (851103551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425551776 + 425551777.

It is an arithmetic number, because the mean of its divisors is an integer number (425551777).

Almost surely, 2^851103553 is an apocalyptic number.

It is an amenable number.

851103553 is a deficient number, since it is larger than the sum of its proper divisors (1).

851103553 is an equidigital number, since it uses as much as digits as its factorization.

851103553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 851103553 is about 29173.6791132007. The cubic root of 851103553 is about 947.6780052779.

The spelling of 851103553 in words is "eight hundred fifty-one million, one hundred three thousand, five hundred fifty-three".