4540154221 has 4 divisors (see below), whose sum is σ = 4544830944. Its totient is φ = 4535477500.

The previous prime is 4540154191. The next prime is 4540154233. The reversal of 4540154221 is 1224510454.

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 not a de Polignac number, because 4540154221 - 2⁷ = 4540154093 is a prime.

It is a super-2 number, since 2×4540154221² = 41226000700928233682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4540154221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540154821) 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, 2336905 + ... + 2338846.

It is an arithmetic number, because the mean of its divisors is an integer number (1136207736).

Almost surely, 2^4540154221 is an apocalyptic number.

It is an amenable number.

4540154221 is a deficient number, since it is larger than the sum of its proper divisors (4676723).

4540154221 is an equidigital number, since it uses as much as digits as its factorization.

4540154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676722.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 4540154221 is about 67380.6665223787. Note that the first 3 decimals coincide. The cubic root of 4540154221 is about 1655.8596947037.

Adding to 4540154221 its reverse (1224510454), we get a palindrome (5764664675).

The spelling of 4540154221 in words is "four billion, five hundred forty million, one hundred fifty-four thousand, two hundred twenty-one".