103631645 has 24 divisors (see below), whose sum is σ = 139336200. Its totient is φ = 73871616.

The previous prime is 103631639. The next prime is 103631707. The reversal of 103631645 is 546136301.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 22108804 + 81522841 = 4702^2 + 9029^2 .

It is not a de Polignac number, because 103631645 - 2¹⁴ = 103615261 is a prime.

It is a super-3 number, since 3×103631645³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22391 + ... + 26619.

It is an arithmetic number, because the mean of its divisors is an integer number (5805675).

Almost surely, 2^103631645 is an apocalyptic number.

It is an amenable number.

103631645 is a deficient number, since it is larger than the sum of its proper divisors (35704555).

103631645 is a wasteful number, since it uses less digits than its factorization.

103631645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289 (or 4276 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 103631645 is about 10179.9629174177. The cubic root of 103631645 is about 469.7110718546.

Adding to 103631645 its reverse (546136301), we get a palindrome (649767946).

The spelling of 103631645 in words is "one hundred three million, six hundred thirty-one thousand, six hundred forty-five".