43494918225 has 24 divisors (see below), whose sum is σ = 78449017632. Its totient is φ = 21088444800.

The previous prime is 43494918221. The next prime is 43494918323. The reversal of 43494918225 is 52281949434.

It is not a de Polignac number, because 43494918225 - 2² = 43494918221 is a prime.

It is a super-2 number, since 2×43494918225² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43494918221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26359732 + ... + 26361381.

It is an arithmetic number, because the mean of its divisors is an integer number (3268709068).

Almost surely, 2^43494918225 is an apocalyptic number.

It is an amenable number.

43494918225 is a deficient number, since it is larger than the sum of its proper divisors (34954099407).

43494918225 is a wasteful number, since it uses less digits than its factorization.

43494918225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52721137 (or 52721132 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The spelling of 43494918225 in words is "forty-three billion, four hundred ninety-four million, nine hundred eighteen thousand, two hundred twenty-five".