49687251 has 4 divisors (see below), whose sum is σ = 66249672. Its totient is φ = 33124832.

The previous prime is 49687247. The next prime is 49687283. The reversal of 49687251 is 15278694.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49687251 - 2² = 49687247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49687151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8281206 + ... + 8281211.

It is an arithmetic number, because the mean of its divisors is an integer number (16562418).

Almost surely, 2^49687251 is an apocalyptic number.

49687251 is a deficient number, since it is larger than the sum of its proper divisors (16562421).

49687251 is a wasteful number, since it uses less digits than its factorization.

49687251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16562420.

The product of its digits is 120960, while the sum is 42.

The square root of 49687251 is about 7048.9184276739. The cubic root of 49687251 is about 367.6334246429.

The spelling of 49687251 in words is "forty-nine million, six hundred eighty-seven thousand, two hundred fifty-one".