2155451 has 2 divisors, whose sum is σ = 2155452. Its totient is φ = 2155450.

The previous prime is 2155429. The next prime is 2155463. The reversal of 2155451 is 1545512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2151451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077725 + 1077726.

It is an arithmetic number, because the mean of its divisors is an integer number (1077726).

2^2155451 is an apocalyptic number.

2155451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155451 is an equidigital number, since it uses as much as digits as its factorization.

2155451 is an evil number, because the sum of its binary digits is even.

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

The square root of 2155451 is about 1468.1454287638. The cubic root of 2155451 is about 129.1752720362.

The spelling of 2155451 in words is "two million, one hundred fifty-five thousand, four hundred fifty-one".