31023531727242 has 64 divisors (see below), whose sum is σ = 64068312268800. Its totient is φ = 10007360675136.

The previous prime is 31023531727229. The next prime is 31023531727249. The reversal of 31023531727242 is 24272713532013.

It is a junction number, because it is equal to n+sod(n) for n = 31023531727194 and 31023531727203.

It is not an unprimeable number, because it can be changed into a prime (31023531727249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118575613 + ... + 118836959.

It is an arithmetic number, because the mean of its divisors is an integer number (1001067379200).

Almost surely, 2^{31023531727242} is an apocalyptic number.

31023531727242 is an abundant number, since it is smaller than the sum of its proper divisors (33044780541558).

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

31023531727242 is a wasteful number, since it uses less digits than its factorization.

31023531727242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264275.

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 31023531727242 in words is "thirty-one trillion, twenty-three billion, five hundred thirty-one million, seven hundred twenty-seven thousand, two hundred forty-two".