105623551 has 8 divisors (see below), whose sum is σ = 115571664. Its totient is φ = 95733120.

The previous prime is 105623549. The next prime is 105623569. The reversal of 105623551 is 155326501.

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

It is a cyclic number.

It is not a de Polignac number, because 105623551 - 2¹ = 105623549 is a prime.

It is a super-2 number, since 2×105623551² = 22312669051699202, 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 (105623501) 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, 10540 + ... + 17953.

It is an arithmetic number, because the mean of its divisors is an integer number (14446458).

Almost surely, 2^105623551 is an apocalyptic number.

105623551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

105623551 is a deficient number, since it is larger than the sum of its proper divisors (9948113).

105623551 is a wasteful number, since it uses less digits than its factorization.

105623551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28841.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 105623551 is about 10277.3319008389. The cubic root of 105623551 is about 472.7014357192.

The spelling of 105623551 in words is "one hundred five million, six hundred twenty-three thousand, five hundred fifty-one".