103405215517 has 2 divisors, whose sum is σ = 103405215518. Its totient is φ = 103405215516.

The previous prime is 103405215509. The next prime is 103405215547. The reversal of 103405215517 is 715512504301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82569447801 + 20835767716 = 287349^2 + 144346^2 .

It is a cyclic number.

It is not a de Polignac number, because 103405215517 - 2³ = 103405215509 is a prime.

It is a super-2 number, since 2×103405215517² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103405215547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51702607758 + 51702607759.

It is an arithmetic number, because the mean of its divisors is an integer number (51702607759).

Almost surely, 2^103405215517 is an apocalyptic number.

It is an amenable number.

103405215517 is a deficient number, since it is larger than the sum of its proper divisors (1).

103405215517 is an equidigital number, since it uses as much as digits as its factorization.

103405215517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

Adding to 103405215517 its reverse (715512504301), we get a palindrome (818917719818).

The spelling of 103405215517 in words is "one hundred three billion, four hundred five million, two hundred fifteen thousand, five hundred seventeen".