214421431531 has 4 divisors (see below), whose sum is σ = 214500879000. Its totient is φ = 214341984064.

The previous prime is 214421431529. The next prime is 214421431547. The reversal of 214421431531 is 135134124412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 214421431531 - 2¹ = 214421431529 is a prime.

It is a super-2 number, since 2×214421431531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214421431493 and 214421431502.

It is not an unprimeable number, because it can be changed into a prime (214421434531) 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, 39719686 + ... + 39725083.

It is an arithmetic number, because the mean of its divisors is an integer number (53625219750).

Almost surely, 2^214421431531 is an apocalyptic number.

214421431531 is a deficient number, since it is larger than the sum of its proper divisors (79447469).

214421431531 is an equidigital number, since it uses as much as digits as its factorization.

214421431531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79447468.

The product of its digits is 11520, while the sum is 31.

Adding to 214421431531 its reverse (135134124412), we get a palindrome (349555555943).

The spelling of 214421431531 in words is "two hundred fourteen billion, four hundred twenty-one million, four hundred thirty-one thousand, five hundred thirty-one".