2154621077 has 8 divisors (see below), whose sum is σ = 2502792192. Its totient is φ = 1816542000.

The previous prime is 2154621043. The next prime is 2154621083. The reversal of 2154621077 is 7701264512.

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

It is not a de Polignac number, because 2154621077 - 2¹⁰ = 2154620053 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 (2154621097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2522549 + ... + 2523402.

It is an arithmetic number, because the mean of its divisors is an integer number (312849024).

Almost surely, 2^2154621077 is an apocalyptic number.

It is an amenable number.

2154621077 is a deficient number, since it is larger than the sum of its proper divisors (348171115).

2154621077 is an equidigital number, since it uses as much as digits as its factorization.

2154621077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046019.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2154621077 is about 46417.8960854539. The cubic root of 2154621077 is about 1291.5869092915.

Adding to 2154621077 its reverse (7701264512), we get a palindrome (9855885589).

The spelling of 2154621077 in words is "two billion, one hundred fifty-four million, six hundred twenty-one thousand, seventy-seven".