815445101 has 2 divisors, whose sum is σ = 815445102. Its totient is φ = 815445100.

The previous prime is 815445073. The next prime is 815445107. The reversal of 815445101 is 101544518.

815445101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808549225 + 6895876 = 28435^2 + 2626^2 .

It is a cyclic number.

It is not a de Polignac number, because 815445101 - 2¹⁴ = 815428717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815445107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407722550 + 407722551.

It is an arithmetic number, because the mean of its divisors is an integer number (407722551).

Almost surely, 2^815445101 is an apocalyptic number.

It is an amenable number.

815445101 is a deficient number, since it is larger than the sum of its proper divisors (1).

815445101 is an equidigital number, since it uses as much as digits as its factorization.

815445101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 815445101 is about 28555.9993871691. Note that the first 3 decimals coincide. The cubic root of 815445101 is about 934.2538781504.

Adding to 815445101 its reverse (101544518), we get a palindrome (916989619).

The spelling of 815445101 in words is "eight hundred fifteen million, four hundred forty-five thousand, one hundred one".