2103213531 has 64 divisors (see below), whose sum is σ = 3231083520. Its totient is φ = 1208586240.

The previous prime is 2103213529. The next prime is 2103213583. The reversal of 2103213531 is 1353123012.

It is not a de Polignac number, because 2103213531 - 2¹ = 2103213529 is a prime.

It is a super-2 number, since 2×2103213531² = 8847014313962975922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2103213498 and 2103213507.

It is not an unprimeable number, because it can be changed into a prime (2103211531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6634585 + ... + 6634901.

It is an arithmetic number, because the mean of its divisors is an integer number (50485680).

Almost surely, 2^2103213531 is an apocalyptic number.

2103213531 is a deficient number, since it is larger than the sum of its proper divisors (1127869989).

2103213531 is a wasteful number, since it uses less digits than its factorization.

2103213531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 2103213531 is about 45860.8060439413. The cubic root of 2103213531 is about 1281.2320353904.

Adding to 2103213531 its reverse (1353123012), we get a palindrome (3456336543).

The spelling of 2103213531 in words is "two billion, one hundred three million, two hundred thirteen thousand, five hundred thirty-one".