31201131225 has 48 divisors (see below), whose sum is σ = 56326019904. Its totient is φ = 15114240000.

The previous prime is 31201131223. The next prime is 31201131253. The reversal of 31201131225 is 52213110213.

It is not a de Polignac number, because 31201131225 - 2¹ = 31201131223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31201131223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 934825 + ... + 967625.

It is an arithmetic number, because the mean of its divisors is an integer number (1173458748).

Almost surely, 2^31201131225 is an apocalyptic number.

It is an amenable number.

31201131225 is a deficient number, since it is larger than the sum of its proper divisors (25124888679).

31201131225 is a wasteful number, since it uses less digits than its factorization.

31201131225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33978 (or 33973 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 31201131225 its reverse (52213110213), we get a palindrome (83414241438).

The spelling of 31201131225 in words is "thirty-one billion, two hundred one million, one hundred thirty-one thousand, two hundred twenty-five".