5721131 has 4 divisors (see below), whose sum is σ = 6161232. Its totient is φ = 5281032.

The previous prime is 5721127. The next prime is 5721139. The reversal of 5721131 is 1311275.

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 5721131 - 2² = 5721127 is a prime.

It is a super-2 number, since 2×5721131² = 65462679838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5721139) 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, 220031 + ... + 220056.

It is an arithmetic number, because the mean of its divisors is an integer number (1540308).

Almost surely, 2^5721131 is an apocalyptic number.

5721131 is a deficient number, since it is larger than the sum of its proper divisors (440101).

5721131 is a wasteful number, since it uses less digits than its factorization.

5721131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440100.

The product of its digits is 210, while the sum is 20.

The square root of 5721131 is about 2391.8885843617. Note that the first 3 decimals coincide. The cubic root of 5721131 is about 178.8520671583.

The spelling of 5721131 in words is "five million, seven hundred twenty-one thousand, one hundred thirty-one".