7213655541 has 4 divisors (see below), whose sum is σ = 9618207392. Its totient is φ = 4809103692.

The previous prime is 7213655521. The next prime is 7213655557. The reversal of 7213655541 is 1455563127.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1455563127 = 3 ⋅485187709.

It is not a de Polignac number, because 7213655541 - 2¹¹ = 7213653493 is a prime.

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 7213655541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213655521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202275921 + ... + 1202275926.

It is an arithmetic number, because the mean of its divisors is an integer number (2404551848).

Almost surely, 2^7213655541 is an apocalyptic number.

It is an amenable number.

7213655541 is a deficient number, since it is larger than the sum of its proper divisors (2404551851).

7213655541 is a wasteful number, since it uses less digits than its factorization.

7213655541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404551850.

The product of its digits is 126000, while the sum is 39.

The square root of 7213655541 is about 84933.2416725042. The cubic root of 7213655541 is about 1932.1987649088.

The spelling of 7213655541 in words is "seven billion, two hundred thirteen million, six hundred fifty-five thousand, five hundred forty-one".