49162721 has 4 divisors (see below), whose sum is σ = 49181844. Its totient is φ = 49143600.

The previous prime is 49162693. The next prime is 49162733. The reversal of 49162721 is 12726194.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21715600 + 27447121 = 4660^2 + 5239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49162721 is a prime.

It is a super-2 number, since 2×49162721² = 4833946272247682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49162741) 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, 4970 + ... + 11091.

It is an arithmetic number, because the mean of its divisors is an integer number (12295461).

Almost surely, 2^49162721 is an apocalyptic number.

It is an amenable number.

49162721 is a deficient number, since it is larger than the sum of its proper divisors (19123).

49162721 is a wasteful number, since it uses less digits than its factorization.

49162721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19122.

The product of its digits is 6048, while the sum is 32.

The square root of 49162721 is about 7011.6132950984. The cubic root of 49162721 is about 366.3351886700.

The spelling of 49162721 in words is "forty-nine million, one hundred sixty-two thousand, seven hundred twenty-one".