4435231421 has 4 divisors (see below), whose sum is σ = 4459735644. Its totient is φ = 4410727200.

The previous prime is 4435231399. The next prime is 4435231441. The reversal of 4435231421 is 1241325344.

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 818532100 + 3616699321 = 28610^2 + 60139^2 .

It is a cyclic number.

It is not a de Polignac number, because 4435231421 - 2³⁰ = 3361489597 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 (4435231441) 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, 12251840 + ... + 12252201.

It is an arithmetic number, because the mean of its divisors is an integer number (1114933911).

Almost surely, 2^4435231421 is an apocalyptic number.

It is an amenable number.

4435231421 is a deficient number, since it is larger than the sum of its proper divisors (24504223).

4435231421 is a wasteful number, since it uses less digits than its factorization.

4435231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24504222.

The product of its digits is 11520, while the sum is 29.

The square root of 4435231421 is about 66597.5331450047. The cubic root of 4435231421 is about 1643.0045335053.

Adding to 4435231421 its reverse (1241325344), we get a palindrome (5676556765).

The spelling of 4435231421 in words is "four billion, four hundred thirty-five million, two hundred thirty-one thousand, four hundred twenty-one".