31142145355 has 4 divisors (see below), whose sum is σ = 37370574432. Its totient is φ = 24913716280.

The previous prime is 31142145347. The next prime is 31142145367. The reversal of 31142145355 is 55354124113.

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

It is not a de Polignac number, because 31142145355 - 2³ = 31142145347 is a prime.

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 31142145355.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114214531 + ... + 3114214540.

It is an arithmetic number, because the mean of its divisors is an integer number (9342643608).

Almost surely, 2^31142145355 is an apocalyptic number.

31142145355 is a deficient number, since it is larger than the sum of its proper divisors (6228429077).

31142145355 is an equidigital number, since it uses as much as digits as its factorization.

31142145355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228429076.

The product of its digits is 36000, while the sum is 34.

Adding to 31142145355 its reverse (55354124113), we get a palindrome (86496269468).

The spelling of 31142145355 in words is "thirty-one billion, one hundred forty-two million, one hundred forty-five thousand, three hundred fifty-five".