2720131 has 4 divisors (see below), whose sum is σ = 2734000. Its totient is φ = 2706264.

The previous prime is 2720117. The next prime is 2720147. The reversal of 2720131 is 1310272.

It is a happy number.

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 2720131 - 2¹³ = 2711939 is a prime.

It is a super-2 number, since 2×2720131² = 14798225314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2720101) 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, 6636 + ... + 7033.

It is an arithmetic number, because the mean of its divisors is an integer number (683500).

2^2720131 is an apocalyptic number.

2720131 is a deficient number, since it is larger than the sum of its proper divisors (13869).

2720131 is a wasteful number, since it uses less digits than its factorization.

2720131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13868.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2720131 is about 1649.2819649775. The cubic root of 2720131 is about 139.5928818794.

The spelling of 2720131 in words is "two million, seven hundred twenty thousand, one hundred thirty-one".