2145230407 has 4 divisors (see below), whose sum is σ = 2145346560. Its totient is φ = 2145114256.

The previous prime is 2145230393. The next prime is 2145230419. The reversal of 2145230407 is 7040325412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2145230407 - 2¹⁹ = 2144706119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145230107) 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, 23518 + ... + 69595.

It is an arithmetic number, because the mean of its divisors is an integer number (536336640).

Almost surely, 2^2145230407 is an apocalyptic number.

2145230407 is a deficient number, since it is larger than the sum of its proper divisors (116153).

2145230407 is an equidigital number, since it uses as much as digits as its factorization.

2145230407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116152.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2145230407 is about 46316.6320774730. The cubic root of 2145230407 is about 1289.7077652630.

Adding to 2145230407 its reverse (7040325412), we get a palindrome (9185555819).

The spelling of 2145230407 in words is "two billion, one hundred forty-five million, two hundred thirty thousand, four hundred seven".