231545401152444 has 36 divisors (see below), whose sum is σ = 585472306672344. Its totient is φ = 77158461426912.

The previous prime is 231545401152437. The next prime is 231545401152449. The reversal of 231545401152444 is 444251104545132.

231545401152444 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 4 + 54 + 0 + 1 + 152 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×231545401152444² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231545401152444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231545401152449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 972335847 + ... + 972573950.

Almost surely, 2^{231545401152444} is an apocalyptic number.

It is an amenable number.

231545401152444 is an abundant number, since it is smaller than the sum of its proper divisors (353926905519900).

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

231545401152444 is a wasteful number, since it uses less digits than its factorization.

231545401152444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944913114 (or 1944913109 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 45.

Adding to 231545401152444 its reverse (444251104545132), we get a palindrome (675796505697576).

The spelling of 231545401152444 in words is "two hundred thirty-one trillion, five hundred forty-five billion, four hundred one million, one hundred fifty-two thousand, four hundred forty-four".