10685551 has 2 divisors, whose sum is σ = 10685552. Its totient is φ = 10685550.

The previous prime is 10685533. The next prime is 10685567. The reversal of 10685551 is 15558601.

10685551 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 is an emirp because it is prime and its reverse (15558601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10685551 - 2¹¹ = 10683503 is a prime.

It is a super-2 number, since 2×10685551² = 228362000347202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10685651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5342775 + 5342776.

It is an arithmetic number, because the mean of its divisors is an integer number (5342776).

Almost surely, 2^10685551 is an apocalyptic number.

10685551 is a deficient number, since it is larger than the sum of its proper divisors (1).

10685551 is an equidigital number, since it uses as much as digits as its factorization.

10685551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 10685551 is about 3268.8761065541. The cubic root of 10685551 is about 220.2583122872.

It can be divided in two parts, 10685 and 551, that added together give a square (11236 = 106²).

The spelling of 10685551 in words is "ten million, six hundred eighty-five thousand, five hundred fifty-one".