31145555542 has 4 divisors (see below), whose sum is σ = 46718333316. Its totient is φ = 15572777770.

The previous prime is 31145555491. The next prime is 31145555561. The reversal of 31145555542 is 24555554113.

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

It is a junction number, because it is equal to n+sod(n) for n = 31145555495 and 31145555504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7786388884 + ... + 7786388887.

It is an arithmetic number, because the mean of its divisors is an integer number (11679583329).

Almost surely, 2^31145555542 is an apocalyptic number.

31145555542 is a deficient number, since it is larger than the sum of its proper divisors (15572777774).

31145555542 is a wasteful number, since it uses less digits than its factorization.

31145555542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15572777773.

The product of its digits is 300000, while the sum is 40.

The spelling of 31145555542 in words is "thirty-one billion, one hundred forty-five million, five hundred fifty-five thousand, five hundred forty-two".