105551390 has 32 divisors (see below), whose sum is σ = 221572800. Its totient is φ = 36187872.

The previous prime is 105551389. The next prime is 105551437. The reversal of 105551390 is 93155501.

It is a happy number.

It is a super-2 number, since 2×105551390² = 22282191861864200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11957 + ... + 18816.

It is an arithmetic number, because the mean of its divisors is an integer number (6924150).

Almost surely, 2^105551390 is an apocalyptic number.

105551390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105551390 is an abundant number, since it is smaller than the sum of its proper divisors (116021410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105551390 is an equidigital number, since it uses as much as digits as its factorization.

105551390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30801 (or 30787 counting only the distinct ones).

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 105551390 is about 10273.8206135790. The cubic root of 105551390 is about 472.5937628282.

The spelling of 105551390 in words is "one hundred five million, five hundred fifty-one thousand, three hundred ninety".