49515257 has 6 divisors (see below), whose sum is σ = 54425994. Its totient is φ = 45013760.

The previous prime is 49515253. The next prime is 49515259. The reversal of 49515257 is 75251594.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27762361 + 21752896 = 5269^2 + 4664^2 .

It is not a de Polignac number, because 49515257 - 2² = 49515253 is a prime.

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 49515257.

It is not an unprimeable number, because it can be changed into a prime (49515253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204488 + ... + 204729.

It is an arithmetic number, because the mean of its divisors is an integer number (9070999).

Almost surely, 2^49515257 is an apocalyptic number.

It is an amenable number.

49515257 is a deficient number, since it is larger than the sum of its proper divisors (4910737).

49515257 is a wasteful number, since it uses less digits than its factorization.

49515257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409239 (or 409228 counting only the distinct ones).

The product of its digits is 63000, while the sum is 38.

The square root of 49515257 is about 7036.7078239756. The cubic root of 49515257 is about 367.2087426503.

The spelling of 49515257 in words is "forty-nine million, five hundred fifteen thousand, two hundred fifty-seven".