49491225 has 81 divisors (see below), whose sum is σ = 104678847. Its totient is φ = 22286880.

The previous prime is 49491217. The next prime is 49491229. The reversal of 49491225 is 52219494.

The square root of 49491225 is 7035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 31674384 = 4221^2 + 5628^2 .

It is not a de Polignac number, because 49491225 - 2³ = 49491217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49491225.

It is not an unprimeable number, because it can be changed into a prime (49491229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 738642 + ... + 738708.

Almost surely, 2^49491225 is an apocalyptic number.

49491225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

49491225 is the 7035-th square number.

49491225 is the 3518-th centered octagonal number.

It is an amenable number.

49491225 is an abundant number, since it is smaller than the sum of its proper divisors (55187622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49491225 is a wasteful number, since it uses less digits than its factorization.

49491225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 82 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The cubic root of 49491225 is about 367.1493253508.

Multiplying 49491225 by its sum of digits (36), we get a square (1781684100 = 42210²).

It can be divided in two parts, 494 and 91225, that added together give a palindrome (91719).

The spelling of 49491225 in words is "forty-nine million, four hundred ninety-one thousand, two hundred twenty-five".