49991225 has 12 divisors (see below), whose sum is σ = 62077500. Its totient is φ = 39936000.

The previous prime is 49991219. The next prime is 49991239. The reversal of 49991225 is 52219994.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1605289 + 48385936 = 1267^2 + 6956^2 .

It is not a de Polignac number, because 49991225 - 2⁴ = 49991209 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30425 + ... + 32025.

It is an arithmetic number, because the mean of its divisors is an integer number (5173125).

Almost surely, 2^49991225 is an apocalyptic number.

It is an amenable number.

49991225 is a deficient number, since it is larger than the sum of its proper divisors (12086275).

49991225 is a wasteful number, since it uses less digits than its factorization.

49991225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860 (or 2855 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 49991225 is about 7070.4472984388. The cubic root of 49991225 is about 368.3815970189.

The spelling of 49991225 in words is "forty-nine million, nine hundred ninety-one thousand, two hundred twenty-five".