103512631 has 4 divisors (see below), whose sum is σ = 104517712. Its totient is φ = 102507552.

The previous prime is 103512601. The next prime is 103512649. The reversal of 103512631 is 136215301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 103512631 - 2¹⁹ = 102988343 is a prime.

It is a super-2 number, since 2×103512631² = 21429729553084322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103512601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502386 + ... + 502591.

It is an arithmetic number, because the mean of its divisors is an integer number (26129428).

Almost surely, 2^103512631 is an apocalyptic number.

103512631 is a deficient number, since it is larger than the sum of its proper divisors (1005081).

103512631 is a wasteful number, since it uses less digits than its factorization.

103512631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005080.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 103512631 is about 10174.1157355320. The cubic root of 103512631 is about 469.5311924135.

Adding to 103512631 its reverse (136215301), we get a palindrome (239727932).

The spelling of 103512631 in words is "one hundred three million, five hundred twelve thousand, six hundred thirty-one".