1421223531 has 32 divisors (see below), whose sum is σ = 2336463360. Its totient is φ = 748306944.

The previous prime is 1421223527. The next prime is 1421223547. The reversal of 1421223531 is 1353221241.

It is not a de Polignac number, because 1421223531 - 2² = 1421223527 is a prime.

It is a super-2 number, since 2×1421223531² = 4039752650136215922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421223581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157500 + ... + 166278.

It is an arithmetic number, because the mean of its divisors is an integer number (73014480).

Almost surely, 2^1421223531 is an apocalyptic number.

1421223531 is a deficient number, since it is larger than the sum of its proper divisors (915239829).

1421223531 is a wasteful number, since it uses less digits than its factorization.

1421223531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9395.

The product of its digits is 1440, while the sum is 24.

The square root of 1421223531 is about 37699.1184379688. The cubic root of 1421223531 is about 1124.3135976819.

Adding to 1421223531 its reverse (1353221241), we get a palindrome (2774444772).

The spelling of 1421223531 in words is "one billion, four hundred twenty-one million, two hundred twenty-three thousand, five hundred thirty-one".