105531000 has 128 divisors (see below), whose sum is σ = 340891200. Its totient is φ = 27148800.

The previous prime is 105530981. The next prime is 105531043. The reversal of 105531000 is 135501.

It is a super-2 number, since 2×105531000² = 22273583922000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86394 + ... + 87606.

Almost surely, 2^105531000 is an apocalyptic number.

105531000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 105531000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170445600).

105531000 is an abundant number, since it is smaller than the sum of its proper divisors (235360200).

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

105531000 is a wasteful number, since it uses less digits than its factorization.

105531000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 105531000 is about 10272.8282376374. The cubic root of 105531000 is about 472.5633296039.

Adding to 105531000 its reverse (135501), we get a palindrome (105666501).

The spelling of 105531000 in words is "one hundred five million, five hundred thirty-one thousand".