31000474555 has 32 divisors (see below), whose sum is σ = 38712225024. Its totient is φ = 23816088576.

The previous prime is 31000474553. The next prime is 31000474573. The reversal of 31000474555 is 55547400013.

It is a cyclic number.

It is not a de Polignac number, because 31000474555 - 2¹ = 31000474553 is a prime.

It is a super-2 number, since 2×31000474555² (a number of 22 digits) contains 22 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 31000474555.

It is not an unprimeable number, because it can be changed into a prime (31000474553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3374949 + ... + 3384121.

It is an arithmetic number, because the mean of its divisors is an integer number (1209757032).

Almost surely, 2^31000474555 is an apocalyptic number.

31000474555 is a deficient number, since it is larger than the sum of its proper divisors (7711750469).

31000474555 is a wasteful number, since it uses less digits than its factorization.

31000474555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9495.

The product of its (nonzero) digits is 42000, while the sum is 34.

Adding to 31000474555 its reverse (55547400013), we get a palindrome (86547874568).

The spelling of 31000474555 in words is "thirty-one billion, four hundred seventy-four thousand, five hundred fifty-five".