30440021222551 has 4 divisors (see below), whose sum is σ = 31014361245672. Its totient is φ = 29865681199432.

The previous prime is 30440021222537. The next prime is 30440021222621. The reversal of 30440021222551 is 15522212004403.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30440021222551 - 2⁵ = 30440021222519 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 (30440021222531) 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, 287170011481 + ... + 287170011586.

It is an arithmetic number, because the mean of its divisors is an integer number (7753590311418).

Almost surely, 2^{30440021222551} is an apocalyptic number.

30440021222551 is a deficient number, since it is larger than the sum of its proper divisors (574340023121).

30440021222551 is an equidigital number, since it uses as much as digits as its factorization.

30440021222551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574340023120.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 30440021222551 its reverse (15522212004403), we get a palindrome (45962233226954).

The spelling of 30440021222551 in words is "thirty trillion, four hundred forty billion, twenty-one million, two hundred twenty-two thousand, five hundred fifty-one".