101631042 has 24 divisors (see below), whose sum is σ = 220388844. Its totient is φ = 33848064.

The previous prime is 101631037. The next prime is 101631053. The reversal of 101631042 is 240136101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 101183481 + 447561 = 10059^2 + 669^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34458 + ... + 37290.

Almost surely, 2^101631042 is an apocalyptic number.

101631042 is an abundant number, since it is smaller than the sum of its proper divisors (118757802).

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

101631042 is a wasteful number, since it uses less digits than its factorization.

101631042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834 (or 4831 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 101631042 is about 10081.2222473270. Note that the first 4 decimals coincide. The cubic root of 101631042 is about 466.6688284480.

Adding to 101631042 its reverse (240136101), we get a palindrome (341767143).

The spelling of 101631042 in words is "one hundred one million, six hundred thirty-one thousand, forty-two".