10551551 has 4 divisors (see below), whose sum is σ = 10558104. Its totient is φ = 10545000.

The previous prime is 10551533. The next prime is 10551553. The reversal of 10551551 is 15515501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10551551 - 2⁶ = 10551487 is a prime.

It is a super-2 number, since 2×10551551² = 222670457011202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10551553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (2639526).

Almost surely, 2^10551551 is an apocalyptic number.

10551551 is a deficient number, since it is larger than the sum of its proper divisors (6553).

10551551 is an equidigital number, since it uses as much as digits as its factorization.

10551551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6552.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 10551551 is about 3248.3151017104. The cubic root of 10551551 is about 219.3337349570. Note that the first 3 decimals are identical.

The spelling of 10551551 in words is "ten million, five hundred fifty-one thousand, five hundred fifty-one".