231155223032544 has 96 divisors (see below), whose sum is σ = 626360641320960. Its totient is φ = 74565658944000.

The previous prime is 231155223032521. The next prime is 231155223032551. The reversal of 231155223032544 is 445230322551132.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×231155223032544² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231155223032496 and 231155223032505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706044117 + ... + 706371435.

It is an arithmetic number, because the mean of its divisors is an integer number (6524590013760).

Almost surely, 2^{231155223032544} is an apocalyptic number.

231155223032544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231155223032544 is an abundant number, since it is smaller than the sum of its proper divisors (395205418288416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231155223032544 is a wasteful number, since it uses less digits than its factorization.

231155223032544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564664 (or 564656 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 231155223032544 its reverse (445230322551132), we get a palindrome (676385545583676).

The spelling of 231155223032544 in words is "two hundred thirty-one trillion, one hundred fifty-five billion, two hundred twenty-three million, thirty-two thousand, five hundred forty-four".