423215421 has 8 divisors (see below), whose sum is σ = 566818560. Its totient is φ = 280877952.

The previous prime is 423215411. The next prime is 423215447. The reversal of 423215421 is 124512324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 423215421 - 2⁵ = 423215389 is a prime.

It is a super-2 number, since 2×423215421² = 358222585144414482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423215391 and 423215400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423215411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315636 + ... + 316973.

It is an arithmetic number, because the mean of its divisors is an integer number (70852320).

Almost surely, 2^423215421 is an apocalyptic number.

It is an amenable number.

423215421 is a deficient number, since it is larger than the sum of its proper divisors (143603139).

423215421 is a wasteful number, since it uses less digits than its factorization.

423215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632835.

The product of its digits is 1920, while the sum is 24.

The square root of 423215421 is about 20572.2001983259. The cubic root of 423215421 is about 750.7934837708.

Adding to 423215421 its reverse (124512324), we get a palindrome (547727745).

The spelling of 423215421 in words is "four hundred twenty-three million, two hundred fifteen thousand, four hundred twenty-one".