31225055 has 4 divisors (see below), whose sum is σ = 37470072. Its totient is φ = 24980040.

The previous prime is 31225049. The next prime is 31225057. The reversal of 31225055 is 55052213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55052213 = 53 ⋅1038721.

It is not a de Polignac number, because 31225055 - 2¹⁶ = 31159519 is a prime.

It is a super-3 number, since 3×31225055³ (a number of 23 digits) contains 333 as substring.

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 31225055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225057) 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 3 ways as a sum of consecutive naturals, for example, 3122501 + ... + 3122510.

It is an arithmetic number, because the mean of its divisors is an integer number (9367518).

Almost surely, 2^31225055 is an apocalyptic number.

31225055 is a deficient number, since it is larger than the sum of its proper divisors (6245017).

31225055 is an equidigital number, since it uses as much as digits as its factorization.

31225055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245016.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 31225055 is about 5587.9383496957. The cubic root of 31225055 is about 314.8964302154.

Adding to 31225055 its reverse (55052213), we get a palindrome (86277268).

The spelling of 31225055 in words is "thirty-one million, two hundred twenty-five thousand, fifty-five".