31542420132 has 18 divisors (see below), whose sum is σ = 79732228758. Its totient is φ = 10514140032.

The previous prime is 31542420103. The next prime is 31542420187. The reversal of 31542420132 is 23102424513.

31542420132 is a `hidden beast` number, since 3 + 1 + 5 + 424 + 201 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29547547236 + 1994872896 = 171894^2 + 44664^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 31542420096 and 31542420105.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 438089133 + ... + 438089204.

Almost surely, 2^31542420132 is an apocalyptic number.

It is an amenable number.

31542420132 is an abundant number, since it is smaller than the sum of its proper divisors (48189808626).

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

31542420132 is a wasteful number, since it uses less digits than its factorization.

31542420132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876178347 (or 876178342 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 31542420132 its reverse (23102424513), we get a palindrome (54644844645).

The spelling of 31542420132 in words is "thirty-one billion, five hundred forty-two million, four hundred twenty thousand, one hundred thirty-two".