2142103505 has 12 divisors (see below), whose sum is σ = 2687148660. Its totient is φ = 1639172832.

The previous prime is 2142103499. The next prime is 2142103517. The reversal of 2142103505 is 5053012412.

It can be written as a sum of positive squares in 2 ways, for example, as 488542609 + 1653560896 = 22103^2 + 40664^2 .

It is not a de Polignac number, because 2142103505 - 2²² = 2137909201 is a prime.

It is a super-2 number, since 2×2142103505² = 9177214852266570050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402290 + ... + 407579.

It is an arithmetic number, because the mean of its divisors is an integer number (223929055).

Almost surely, 2^2142103505 is an apocalyptic number.

It is an amenable number.

2142103505 is a deficient number, since it is larger than the sum of its proper divisors (545045155).

2142103505 is an equidigital number, since it uses as much as digits as its factorization.

2142103505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809920 (or 809897 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2142103505 is about 46282.8640535566. The cubic root of 2142103505 is about 1289.0808317065.

Adding to 2142103505 its reverse (5053012412), we get a palindrome (7195115917).

The spelling of 2142103505 in words is "two billion, one hundred forty-two million, one hundred three thousand, five hundred five".