154430221031 has 4 divisors (see below), whose sum is σ = 154851012192. Its totient is φ = 154009429872.

The previous prime is 154430221003. The next prime is 154430221039. The reversal of 154430221031 is 130122034451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130122034451 = 19 ⋅6848528129.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154430221031 is a prime.

It is a super-2 number, since 2×154430221031² (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 (154430221039) 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, 210395030 + ... + 210395763.

It is an arithmetic number, because the mean of its divisors is an integer number (38712753048).

Almost surely, 2^154430221031 is an apocalyptic number.

154430221031 is a deficient number, since it is larger than the sum of its proper divisors (420791161).

154430221031 is an equidigital number, since it uses as much as digits as its factorization.

154430221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420791160.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 154430221031 its reverse (130122034451), we get a palindrome (284552255482).

The spelling of 154430221031 in words is "one hundred fifty-four billion, four hundred thirty million, two hundred twenty-one thousand, thirty-one".