105231988 has 6 divisors (see below), whose sum is σ = 184155986. Its totient is φ = 52615992.

The previous prime is 105231961. The next prime is 105232007. The reversal of 105231988 is 889132501.

It can be written as a sum of positive squares in only one way, i.e., 104407524 + 824464 = 10218^2 + 908^2 .

It is a super-2 number, since 2×105231988² = 22147542596864288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13153995 + ... + 13154002.

Almost surely, 2^105231988 is an apocalyptic number.

It is an amenable number.

105231988 is a deficient number, since it is larger than the sum of its proper divisors (78923998).

105231988 is a wasteful number, since it uses less digits than its factorization.

105231988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26308001 (or 26307999 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 105231988 is about 10258.2643756144. The cubic root of 105231988 is about 472.1165863970.

The spelling of 105231988 in words is "one hundred five million, two hundred thirty-one thousand, nine hundred eighty-eight".