30142221440 has 32 divisors (see below), whose sum is σ = 72058749660. Its totient is φ = 12056888320.

The previous prime is 30142221437. The next prime is 30142221443. The reversal of 30142221440 is 4412224103.

It is an interprime number because it is at equal distance from previous prime (30142221437) and next prime (30142221443).

It can be written as a sum of positive squares in 2 ways, for example, as 30139737664 + 2483776 = 173608^2 + 1576^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (30142221443) 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, 23547971 + ... + 23549250.

Almost surely, 2^30142221440 is an apocalyptic number.

It is an amenable number.

30142221440 is an abundant number, since it is smaller than the sum of its proper divisors (41916528220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30142221440 is an equidigital number, since it uses as much as digits as its factorization.

30142221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47097240 (or 47097228 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 30142221440 its reverse (4412224103), we get a palindrome (34554445543).

The spelling of 30142221440 in words is "thirty billion, one hundred forty-two million, two hundred twenty-one thousand, four hundred forty".