105655551 has 8 divisors (see below), whose sum is σ = 140959104. Its totient is φ = 70394520.

The previous prime is 105655547. The next prime is 105655559. The reversal of 105655551 is 155556501.

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

It is not a de Polignac number, because 105655551 - 2² = 105655547 is a prime.

It is a super-2 number, since 2×105655551² = 22326190914227202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105655559) 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, 4291 + ... + 15156.

It is an arithmetic number, because the mean of its divisors is an integer number (17619888).

Almost surely, 2^105655551 is an apocalyptic number.

105655551 is a deficient number, since it is larger than the sum of its proper divisors (35303553).

105655551 is a wasteful number, since it uses less digits than its factorization.

105655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21261.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 105655551 is about 10278.8886072377. Note that the first 3 decimals coincide. The cubic root of 105655551 is about 472.7491678726.

The spelling of 105655551 in words is "one hundred five million, six hundred fifty-five thousand, five hundred fifty-one".