2140551 has 24 divisors (see below), whose sum is σ = 3597984. Its totient is φ = 1200960.

The previous prime is 2140549. The next prime is 2140573. The reversal of 2140551 is 1550412.

It is not a de Polignac number, because 2140551 - 2¹ = 2140549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3565 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (149916).

2^2140551 is an apocalyptic number.

2140551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2140551 is a deficient number, since it is larger than the sum of its proper divisors (1457433).

2140551 is a wasteful number, since it uses less digits than its factorization.

2140551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2140551 is about 1463.0621996347. The cubic root of 2140551 is about 128.8769332890.

Adding to 2140551 its reverse (1550412), we get a palindrome (3690963).

The spelling of 2140551 in words is "two million, one hundred forty thousand, five hundred fifty-one".