103143521 has 16 divisors (see below), whose sum is σ = 114100224. Its totient is φ = 92643264.

The previous prime is 103143511. The next prime is 103143553. The reversal of 103143521 is 125341301.

It is a cyclic number.

It is not a de Polignac number, because 103143521 - 2¹⁸ = 102881377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103143493 and 103143502.

It is not an unprimeable number, because it can be changed into a prime (103143511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135875 + ... + 136631.

It is an arithmetic number, because the mean of its divisors is an integer number (7131264).

Almost surely, 2^103143521 is an apocalyptic number.

It is an amenable number.

103143521 is a deficient number, since it is larger than the sum of its proper divisors (10956703).

103143521 is a wasteful number, since it uses less digits than its factorization.

103143521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 103143521 is about 10155.9598758561. The cubic root of 103143521 is about 468.9724359182.

Adding to 103143521 its reverse (125341301), we get a palindrome (228484822).

The spelling of 103143521 in words is "one hundred three million, one hundred forty-three thousand, five hundred twenty-one".