31005213201 has 12 divisors (see below), whose sum is σ = 44843255028. Its totient is φ = 20643397344.

The previous prime is 31005213191. The next prime is 31005213203. The reversal of 31005213201 is 10231250013.

It can be written as a sum of positive squares in 2 ways, for example, as 14768082576 + 16237130625 = 121524^2 + 127425^2 .

It is not a de Polignac number, because 31005213201 - 2¹³ = 31005205009 is a prime.

It is a super-2 number, since 2×31005213201² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31005213203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2221390 + ... + 2235303.

It is an arithmetic number, because the mean of its divisors is an integer number (3736937919).

Almost surely, 2^31005213201 is an apocalyptic number.

It is an amenable number.

31005213201 is a deficient number, since it is larger than the sum of its proper divisors (13838041827).

31005213201 is a wasteful number, since it uses less digits than its factorization.

31005213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457472 (or 4457469 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 31005213201 its reverse (10231250013), we get a palindrome (41236463214).

The spelling of 31005213201 in words is "thirty-one billion, five million, two hundred thirteen thousand, two hundred one".