49218651225 has 18 divisors (see below), whose sum is σ = 88156073486. Its totient is φ = 26249947200.

The previous prime is 49218651221. The next prime is 49218651233. The reversal of 49218651225 is 52215681294.

It can be written as a sum of positive squares in 3 ways, for example, as 14579113536 + 34639537689 = 120744^2 + 186117^2 .

It is not a de Polignac number, because 49218651225 - 2² = 49218651221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49218651221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 109374556 + ... + 109375005.

Almost surely, 2^49218651225 is an apocalyptic number.

49218651225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49218651225 is a deficient number, since it is larger than the sum of its proper divisors (38937422261).

49218651225 is a wasteful number, since it uses less digits than its factorization.

49218651225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218749577 (or 218749569 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 49218651225 in words is "forty-nine billion, two hundred eighteen million, six hundred fifty-one thousand, two hundred twenty-five".