31542420131 has 8 divisors (see below), whose sum is σ = 31983476064. Its totient is φ = 31101606720.

The previous prime is 31542420103. The next prime is 31542420187. The reversal of 31542420131 is 13102424513.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31542420131 - 2²⁶ = 31475311267 is a prime.

It is a super-3 number, since 3×31542420131³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31542420131.

It is not an unprimeable number, because it can be changed into a prime (31542420101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209666 + ... + 327176.

It is an arithmetic number, because the mean of its divisors is an integer number (3997934508).

Almost surely, 2^31542420131 is an apocalyptic number.

31542420131 is a deficient number, since it is larger than the sum of its proper divisors (441055933).

31542420131 is a wasteful number, since it uses less digits than its factorization.

31542420131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121261.

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

Adding to 31542420131 its reverse (13102424513), we get a palindrome (44644844644).

The spelling of 31542420131 in words is "thirty-one billion, five hundred forty-two million, four hundred twenty thousand, one hundred thirty-one".