325513981 has 16 divisors (see below), whose sum is σ = 362682880. Its totient is φ = 290122560.

The previous prime is 325513961. The next prime is 325513987. The reversal of 325513981 is 189315523.

It is a happy number.

It is not a de Polignac number, because 325513981 - 2⁵ = 325513949 is a prime.

It is a super-2 number, since 2×325513981² = 211918703652936722, which 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 325513981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325513987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297271 + ... + 298363.

It is an arithmetic number, because the mean of its divisors is an integer number (22667680).

Almost surely, 2^325513981 is an apocalyptic number.

325513981 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

325513981 is a deficient number, since it is larger than the sum of its proper divisors (37168899).

325513981 is a wasteful number, since it uses less digits than its factorization.

325513981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876.

The product of its digits is 32400, while the sum is 37.

The square root of 325513981 is about 18042.0060137447. The cubic root of 325513981 is about 687.8966832925.

The spelling of 325513981 in words is "three hundred twenty-five million, five hundred thirteen thousand, nine hundred eighty-one".