48513721 has 4 divisors (see below), whose sum is σ = 48984832. Its totient is φ = 48042612.

The previous prime is 48513713. The next prime is 48513737. The reversal of 48513721 is 12731584.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 48513721 - 2³ = 48513713 is a prime.

It is a super-2 number, since 2×48513721² = 4707162250531682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48513221) 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, 235401 + ... + 235606.

It is an arithmetic number, because the mean of its divisors is an integer number (12246208).

Almost surely, 2^48513721 is an apocalyptic number.

It is an amenable number.

48513721 is a deficient number, since it is larger than the sum of its proper divisors (471111).

48513721 is a wasteful number, since it uses less digits than its factorization.

48513721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471110.

The product of its digits is 6720, while the sum is 31.

The square root of 48513721 is about 6965.1791793176. The cubic root of 48513721 is about 364.7160386028.

The spelling of 48513721 in words is "forty-eight million, five hundred thirteen thousand, seven hundred twenty-one".