103215457 has 2 divisors, whose sum is σ = 103215458. Its totient is φ = 103215456.

The previous prime is 103215419. The next prime is 103215473. The reversal of 103215457 is 754512301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102900736 + 314721 = 10144^2 + 561^2 .

It is an emirp because it is prime and its reverse (754512301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103215457 is a prime.

It is not a weakly prime, because it can be changed into another prime (103216457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51607728 + 51607729.

It is an arithmetic number, because the mean of its divisors is an integer number (51607729).

Almost surely, 2^103215457 is an apocalyptic number.

It is an amenable number.

103215457 is a deficient number, since it is larger than the sum of its proper divisors (1).

103215457 is an equidigital number, since it uses as much as digits as its factorization.

103215457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 103215457 is about 10159.5008243516. The cubic root of 103215457 is about 469.0814366612.

Adding to 103215457 its reverse (754512301), we get a palindrome (857727758).

The spelling of 103215457 in words is "one hundred three million, two hundred fifteen thousand, four hundred fifty-seven".