2131969 has 8 divisors (see below), whose sum is σ = 2453888. Its totient is φ = 1814400.

The previous prime is 2131951. The next prime is 2131979. The reversal of 2131969 is 9691312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2131969 - 2⁵ = 2131937 is a prime.

It is a super-2 number, since 2×2131969² = 9090583633922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131969.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49 + ... + 2065.

It is an arithmetic number, because the mean of its divisors is an integer number (306736).

It is a Proth number, since it is equal to 1041 ⋅ 2¹¹ + 1 and 1041 < 2¹¹.

2^2131969 is an apocalyptic number.

It is an amenable number.

2131969 is a deficient number, since it is larger than the sum of its proper divisors (321919).

2131969 is a wasteful number, since it uses less digits than its factorization.

2131969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175.

The product of its digits is 2916, while the sum is 31.

The square root of 2131969 is about 1460.1263643945. The cubic root of 2131969 is about 128.7044694004.

The spelling of 2131969 in words is "two million, one hundred thirty-one thousand, nine hundred sixty-nine".