2154551 has 8 divisors (see below), whose sum is σ = 2474784. Its totient is φ = 1837440.

The previous prime is 2154541. The next prime is 2154553. The reversal of 2154551 is 1554512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2154551 - 2⁶ = 2154487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154553) 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, 971 + ... + 2291.

It is an arithmetic number, because the mean of its divisors is an integer number (309348).

2^2154551 is an apocalyptic number.

2154551 is a deficient number, since it is larger than the sum of its proper divisors (320233).

2154551 is a wasteful number, since it uses less digits than its factorization.

2154551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561.

The product of its digits is 1000, while the sum is 23.

The square root of 2154551 is about 1467.8388876168. The cubic root of 2154551 is about 129.1572906595.

The spelling of 2154551 in words is "two million, one hundred fifty-four thousand, five hundred fifty-one".