2231241426561 has 16 divisors (see below), whose sum is σ = 3547812455424. Its totient is φ = 1219560531024.

The previous prime is 2231241426541. The next prime is 2231241426569. The reversal of 2231241426561 is 1656241421322.

It is not a de Polignac number, because 2231241426561 - 2⁹ = 2231241426049 is a prime.

It is a super-3 number, since 3×2231241426561³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231241426569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2309773251 + ... + 2309774216.

It is an arithmetic number, because the mean of its divisors is an integer number (221738278464).

Almost surely, 2^{2231241426561} is an apocalyptic number.

2231241426561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2231241426561 is a deficient number, since it is larger than the sum of its proper divisors (1316571028863).

2231241426561 is a wasteful number, since it uses less digits than its factorization.

2231241426561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619547500.

The product of its digits is 138240, while the sum is 39.

Adding to 2231241426561 its reverse (1656241421322), we get a palindrome (3887482847883).

The spelling of 2231241426561 in words is "two trillion, two hundred thirty-one billion, two hundred forty-one million, four hundred twenty-six thousand, five hundred sixty-one".