4323215421 has 12 divisors (see below), whose sum is σ = 7136736672. Its totient is φ = 2470408776.

The previous prime is 4323215389. The next prime is 4323215431. The reversal of 4323215421 is 1245123234.

4323215421 is a `hidden beast` number, since 4 + 3 + 23 + 215 + 421 = 666.

It is not a de Polignac number, because 4323215421 - 2⁵ = 4323215389 is a prime.

It is a super-3 number, since 3×4323215421³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4323215431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34311171 + ... + 34311296.

It is an arithmetic number, because the mean of its divisors is an integer number (594728056).

Almost surely, 2^4323215421 is an apocalyptic number.

It is an amenable number.

4323215421 is a deficient number, since it is larger than the sum of its proper divisors (2813521251).

4323215421 is a wasteful number, since it uses less digits than its factorization.

4323215421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68622480 (or 68622477 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 4323215421 is about 65751.1628870547. The cubic root of 4323215421 is about 1629.0545436077.

Adding to 4323215421 its reverse (1245123234), we get a palindrome (5568338655).

It can be divided in two parts, 43232 and 15421, that added together give a triangular number (58653 = T₃₄₂).

The spelling of 4323215421 in words is "four billion, three hundred twenty-three million, two hundred fifteen thousand, four hundred twenty-one".