420321131 has 4 divisors (see below), whose sum is σ = 422838192. Its totient is φ = 417804072.

The previous prime is 420321119. The next prime is 420321137. The reversal of 420321131 is 131123024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420321131 is a prime.

It is a super-2 number, since 2×420321131² = 353339706330238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420321137) 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, 1258280 + ... + 1258613.

It is an arithmetic number, because the mean of its divisors is an integer number (105709548).

Almost surely, 2^420321131 is an apocalyptic number.

420321131 is a deficient number, since it is larger than the sum of its proper divisors (2517061).

420321131 is a wasteful number, since it uses less digits than its factorization.

420321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517060.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 420321131 is about 20501.7348290334. The cubic root of 420321131 is about 749.0780558972.

Adding to 420321131 its reverse (131123024), we get a palindrome (551444155).

The spelling of 420321131 in words is "four hundred twenty million, three hundred twenty-one thousand, one hundred thirty-one".