2154810641 has 4 divisors (see below), whose sum is σ = 2155386432. Its totient is φ = 2154234852.

The previous prime is 2154810629. The next prime is 2154810649. The reversal of 2154810641 is 1460184512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154810641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154810598 and 2154810607.

It is not an unprimeable number, because it can be changed into a prime (2154810649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282245 + ... + 289778.

It is an arithmetic number, because the mean of its divisors is an integer number (538846608).

Almost surely, 2^2154810641 is an apocalyptic number.

It is an amenable number.

2154810641 is a deficient number, since it is larger than the sum of its proper divisors (575791).

2154810641 is an equidigital number, since it uses as much as digits as its factorization.

2154810641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575790.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 2154810641 is about 46419.9379685066. The cubic root of 2154810641 is about 1291.6247862069.

The spelling of 2154810641 in words is "two billion, one hundred fifty-four million, eight hundred ten thousand, six hundred forty-one".