31145454253442 has 4 divisors (see below), whose sum is σ = 46718181380166. Its totient is φ = 15572727126720.

The previous prime is 31145454253439. The next prime is 31145454253477. The reversal of 31145454253442 is 24435245454113.

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

It can be written as a sum of positive squares in only one way, i.e., 24759073270801 + 6386380982641 = 4975849^2 + 2527129^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7786363563359 + ... + 7786363563362.

Almost surely, 2^{31145454253442} is an apocalyptic number.

31145454253442 is a deficient number, since it is larger than the sum of its proper divisors (15572727126724).

31145454253442 is a wasteful number, since it uses less digits than its factorization.

31145454253442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15572727126723.

The product of its digits is 4608000, while the sum is 47.

The spelling of 31145454253442 in words is "thirty-one trillion, one hundred forty-five billion, four hundred fifty-four million, two hundred fifty-three thousand, four hundred forty-two".