10551561 has 8 divisors (see below), whose sum is σ = 14153664. Its totient is φ = 6991920.

The previous prime is 10551559. The next prime is 10551581. The reversal of 10551561 is 16515501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10551561 - 2¹ = 10551559 is a prime.

It is a super-2 number, since 2×10551561² = 222670879073442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10551511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10030 + ... + 11031.

It is an arithmetic number, because the mean of its divisors is an integer number (1769208).

Almost surely, 2^10551561 is an apocalyptic number.

It is an amenable number.

10551561 is a deficient number, since it is larger than the sum of its proper divisors (3602103).

10551561 is a wasteful number, since it uses less digits than its factorization.

10551561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21231.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 10551561 is about 3248.3166409696. The cubic root of 10551561 is about 219.3338042465. Note that the first 3 decimals are identical.

The spelling of 10551561 in words is "ten million, five hundred fifty-one thousand, five hundred sixty-one".