20223051531 has 32 divisors (see below), whose sum is σ = 27991541760. Its totient is φ = 12973478400.

The previous prime is 20223051529. The next prime is 20223051551. The reversal of 20223051531 is 13515032202.

It is a happy number.

It is not a de Polignac number, because 20223051531 - 2¹ = 20223051529 is a prime.

It is a super-2 number, since 2×20223051531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20223051551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15663996 + ... + 15665286.

It is an arithmetic number, because the mean of its divisors is an integer number (874735680).

Almost surely, 2^20223051531 is an apocalyptic number.

20223051531 is a deficient number, since it is larger than the sum of its proper divisors (7768490229).

20223051531 is a wasteful number, since it uses less digits than its factorization.

20223051531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 20223051531 its reverse (13515032202), we get a palindrome (33738083733).

The spelling of 20223051531 in words is "twenty billion, two hundred twenty-three million, fifty-one thousand, five hundred thirty-one".