10503205551 has 16 divisors (see below), whose sum is σ = 15757273600. Its totient is φ = 6913500984.

The previous prime is 10503205541. The next prime is 10503205561. The reversal of 10503205551 is 15550230501.

10503205551 is a `hidden beast` number, since 105 + 0 + 3 + 2 + 0 + 5 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (10503205541) and next prime (10503205561).

It is not a de Polignac number, because 10503205551 - 2⁵ = 10503205519 is a prime.

It is a super-2 number, since 2×10503205551² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10503205541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2459941 + ... + 2464206.

It is an arithmetic number, because the mean of its divisors is an integer number (984829600).

Almost surely, 2^10503205551 is an apocalyptic number.

10503205551 is a deficient number, since it is larger than the sum of its proper divisors (5254068049).

10503205551 is an equidigital number, since it uses as much as digits as its factorization.

10503205551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924235 (or 4924229 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The spelling of 10503205551 in words is "ten billion, five hundred three million, two hundred five thousand, five hundred fifty-one".