2130423445 has 4 divisors (see below), whose sum is σ = 2556508140. Its totient is φ = 1704338752.

The previous prime is 2130423439. The next prime is 2130423467. The reversal of 2130423445 is 5443240312.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 387026929 + 1743396516 = 19673^2 + 41754^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130423445 - 2⁹ = 2130422933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213042340 + ... + 213042349.

It is an arithmetic number, because the mean of its divisors is an integer number (639127035).

Almost surely, 2^2130423445 is an apocalyptic number.

It is an amenable number.

2130423445 is a deficient number, since it is larger than the sum of its proper divisors (426084695).

2130423445 is an equidigital number, since it uses as much as digits as its factorization.

2130423445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426084694.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2130423445 is about 46156.5103208637. The cubic root of 2130423445 is about 1286.7336076731.

Adding to 2130423445 its reverse (5443240312), we get a palindrome (7573663757).

The spelling of 2130423445 in words is "two billion, one hundred thirty million, four hundred twenty-three thousand, four hundred forty-five".