103555232509 has 2 divisors, whose sum is σ = 103555232510. Its totient is φ = 103555232508.

The previous prime is 103555232423. The next prime is 103555232513. The reversal of 103555232509 is 905232555301.

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., 101504048409 + 2051184100 = 318597^2 + 45290^2 .

It is a cyclic number.

It is not a de Polignac number, because 103555232509 - 2⁷ = 103555232381 is a prime.

It is a super-3 number, since 3×103555232509³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103555230509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51777616254 + 51777616255.

It is an arithmetic number, because the mean of its divisors is an integer number (51777616255).

Almost surely, 2^103555232509 is an apocalyptic number.

It is an amenable number.

103555232509 is a deficient number, since it is larger than the sum of its proper divisors (1).

103555232509 is an equidigital number, since it uses as much as digits as its factorization.

103555232509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 202500, while the sum is 40.

The spelling of 103555232509 in words is "one hundred three billion, five hundred fifty-five million, two hundred thirty-two thousand, five hundred nine".