231420223343542 has 32 divisors (see below), whose sum is σ = 373211216642880. Its totient is φ = 107230157045760.

The previous prime is 231420223343513. The next prime is 231420223343591. The reversal of 231420223343542 is 245343322024132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231420223343495 and 231420223343504.

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, 60475153 + ... + 64187884.

It is an arithmetic number, because the mean of its divisors is an integer number (11662850520090).

Almost surely, 2^{231420223343542} is an apocalyptic number.

231420223343542 is a deficient number, since it is larger than the sum of its proper divisors (141790993299338).

231420223343542 is a wasteful number, since it uses less digits than its factorization.

231420223343542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124663896.

The product of its (nonzero) digits is 829440, while the sum is 40.

Adding to 231420223343542 its reverse (245343322024132), we get a palindrome (476763545367674).

The spelling of 231420223343542 in words is "two hundred thirty-one trillion, four hundred twenty billion, two hundred twenty-three million, three hundred forty-three thousand, five hundred forty-two".