31542420311 has 4 divisors (see below), whose sum is σ = 31986679824. Its totient is φ = 31098160800.

The previous prime is 31542420269. The next prime is 31542420341. The reversal of 31542420311 is 11302424513.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31542420311 - 2¹⁰ = 31542419287 is a prime.

It is a super-3 number, since 3×31542420311³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31542420341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222129650 + ... + 222129791.

It is an arithmetic number, because the mean of its divisors is an integer number (7996669956).

Almost surely, 2^31542420311 is an apocalyptic number.

31542420311 is a deficient number, since it is larger than the sum of its proper divisors (444259513).

31542420311 is an equidigital number, since it uses as much as digits as its factorization.

31542420311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444259512.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31542420311 its reverse (11302424513), we get a palindrome (42844844824).

The spelling of 31542420311 in words is "thirty-one billion, five hundred forty-two million, four hundred twenty thousand, three hundred eleven".