31423145105 has 16 divisors (see below), whose sum is σ = 41150018304. Its totient is φ = 22845271680.

The previous prime is 31423145101. The next prime is 31423145119. The reversal of 31423145105 is 50154132413.

It is not a de Polignac number, because 31423145105 - 2² = 31423145101 is a prime.

It is a super-2 number, since 2×31423145105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31423145101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63389 + ... + 258581.

It is an arithmetic number, because the mean of its divisors is an integer number (2571876144).

Almost surely, 2^31423145105 is an apocalyptic number.

It is an amenable number.

31423145105 is a deficient number, since it is larger than the sum of its proper divisors (9726873199).

31423145105 is a wasteful number, since it uses less digits than its factorization.

31423145105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198136.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 31423145105 its reverse (50154132413), we get a palindrome (81577277518).

The spelling of 31423145105 in words is "thirty-one billion, four hundred twenty-three million, one hundred forty-five thousand, one hundred five".