2131958 has 4 divisors (see below), whose sum is σ = 3197940. Its totient is φ = 1065978.

The previous prime is 2131951. The next prime is 2131979. The reversal of 2131958 is 8591312.

2131958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2131958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532988 + ... + 532991.

It is an arithmetic number, because the mean of its divisors is an integer number (799485).

2^2131958 is an apocalyptic number.

2131958 is a deficient number, since it is larger than the sum of its proper divisors (1065982).

2131958 is a wasteful number, since it uses less digits than its factorization.

2131958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065981.

The product of its digits is 2160, while the sum is 29.

The square root of 2131958 is about 1460.1225975924. The cubic root of 2131958 is about 128.7042480476.

The spelling of 2131958 in words is "two million, one hundred thirty-one thousand, nine hundred fifty-eight".