131401220424 has 32 divisors (see below), whose sum is σ = 329937576000. Its totient is φ = 43609136832.

The previous prime is 131401220413. The next prime is 131401220437. The reversal of 131401220424 is 424022104131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 131401220394 and 131401220403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11948764 + ... + 11959755.

It is an arithmetic number, because the mean of its divisors is an integer number (10310549250).

Almost surely, 2^131401220424 is an apocalyptic number.

It is an amenable number.

131401220424 is an abundant number, since it is smaller than the sum of its proper divisors (198536355576).

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

131401220424 is a wasteful number, since it uses less digits than its factorization.

131401220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23908757 (or 23908753 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 131401220424 its reverse (424022104131), we get a palindrome (555423324555).

The spelling of 131401220424 in words is "one hundred thirty-one billion, four hundred one million, two hundred twenty thousand, four hundred twenty-four".