2113531503 has 4 divisors (see below), whose sum is σ = 2818042008. Its totient is φ = 1409021000.

The previous prime is 2113531471. The next prime is 2113531531. The reversal of 2113531503 is 3051353112.

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 2113531503 - 2⁵ = 2113531471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113532503) 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, 352255248 + ... + 352255253.

It is an arithmetic number, because the mean of its divisors is an integer number (704510502).

Almost surely, 2^2113531503 is an apocalyptic number.

2113531503 is a deficient number, since it is larger than the sum of its proper divisors (704510505).

2113531503 is an equidigital number, since it uses as much as digits as its factorization.

2113531503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704510504.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 2113531503 is about 45973.1606809886. The cubic root of 2113531503 is about 1283.3237800754.

Adding to 2113531503 its reverse (3051353112), we get a palindrome (5164884615).

The spelling of 2113531503 in words is "two billion, one hundred thirteen million, five hundred thirty-one thousand, five hundred three".