31145055 has 16 divisors (see below), whose sum is σ = 49901280. Its totient is φ = 16587648.

The previous prime is 31145053. The next prime is 31145057. The reversal of 31145055 is 55054113.

It is an interprime number because it is at equal distance from previous prime (31145053) and next prime (31145057).

It is not a de Polignac number, because 31145055 - 2¹ = 31145053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145053) 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, 20709 + ... + 22161.

It is an arithmetic number, because the mean of its divisors is an integer number (3118830).

Almost surely, 2^31145055 is an apocalyptic number.

31145055 is a deficient number, since it is larger than the sum of its proper divisors (18756225).

31145055 is a wasteful number, since it uses less digits than its factorization.

31145055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 31145055 is about 5580.7754837478. The cubic root of 31145055 is about 314.6272739327.

Adding to 31145055 its reverse (55054113), we get a palindrome (86199168).

The spelling of 31145055 in words is "thirty-one million, one hundred forty-five thousand, fifty-five".