144302455021 has 4 divisors (see below), whose sum is σ = 147658326112. Its totient is φ = 140946583932.

The previous prime is 144302454979. The next prime is 144302455051. The reversal of 144302455021 is 120554203441.

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: 120554203441 = 7 ⋅17222029063.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144302455021 is a prime.

It is a super-2 number, since 2×144302455021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144302455051) 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, 1677935481 + ... + 1677935566.

It is an arithmetic number, because the mean of its divisors is an integer number (36914581528).

Almost surely, 2^144302455021 is an apocalyptic number.

It is an amenable number.

144302455021 is a deficient number, since it is larger than the sum of its proper divisors (3355871091).

144302455021 is an equidigital number, since it uses as much as digits as its factorization.

144302455021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355871090.

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

Adding to 144302455021 its reverse (120554203441), we get a palindrome (264856658462).

The spelling of 144302455021 in words is "one hundred forty-four billion, three hundred two million, four hundred fifty-five thousand, twenty-one".