2131554 has 16 divisors (see below), whose sum is σ = 4344192. Its totient is φ = 697008.

The previous prime is 2131541. The next prime is 2131559. The reversal of 2131554 is 4551312.

It is a self number, because there is not a number n which added to its sum of digits gives 2131554.

It is not an unprimeable number, because it can be changed into a prime (2131559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3034 + ... + 3669.

It is an arithmetic number, because the mean of its divisors is an integer number (271512).

2^2131554 is an apocalyptic number.

2131554 is an abundant number, since it is smaller than the sum of its proper divisors (2212638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131554 is a wasteful number, since it uses less digits than its factorization.

2131554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6761.

The product of its digits is 600, while the sum is 21.

The square root of 2131554 is about 1459.9842464904. The cubic root of 2131554 is about 128.6961178373.

Adding to 2131554 its reverse (4551312), we get a palindrome (6682866).

The spelling of 2131554 in words is "two million, one hundred thirty-one thousand, five hundred fifty-four".