31005145200202 has 16 divisors (see below), whose sum is σ = 48113379665640. Its totient is φ = 14967395255232.

The previous prime is 31005145200191. The next prime is 31005145200229. The reversal of 31005145200202 is 20200254150013.

It can be written as a sum of positive squares in 4 ways, for example, as 8730908045721 + 22274237154481 = 2954811^2 + 4719559^2 .

It is a super-2 number, since 2×31005145200202² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9372333 + ... + 12241360.

Almost surely, 2^{31005145200202} is an apocalyptic number.

31005145200202 is a deficient number, since it is larger than the sum of its proper divisors (17108234465438).

31005145200202 is a wasteful number, since it uses less digits than its factorization.

31005145200202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21638457.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 31005145200202 its reverse (20200254150013), we get a palindrome (51205399350215).

The spelling of 31005145200202 in words is "thirty-one trillion, five billion, one hundred forty-five million, two hundred thousand, two hundred two".