2145422423 has 6 divisors (see below), whose sum is σ = 2279047656. Its totient is φ = 2019220832.

The previous prime is 2145422387. The next prime is 2145422437. The reversal of 2145422423 is 3242245412.

It is not a de Polignac number, because 2145422423 - 2¹⁸ = 2145160279 is a prime.

It is a super-4 number, since 4×2145422423⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145422483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3711515 + ... + 3712092.

It is an arithmetic number, because the mean of its divisors is an integer number (379841276).

Almost surely, 2^2145422423 is an apocalyptic number.

2145422423 is a deficient number, since it is larger than the sum of its proper divisors (133625233).

2145422423 is an equidigital number, since it uses as much as digits as its factorization.

2145422423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7423641 (or 7423624 counting only the distinct ones).

The product of its digits is 15360, while the sum is 29.

The square root of 2145422423 is about 46318.7048933797. The cubic root of 2145422423 is about 1289.7462439795.

Adding to 2145422423 its reverse (3242245412), we get a palindrome (5387667835).

The spelling of 2145422423 in words is "two billion, one hundred forty-five million, four hundred twenty-two thousand, four hundred twenty-three".