154720655231 has 4 divisors (see below), whose sum is σ = 154820541000. Its totient is φ = 154620769464.

The previous prime is 154720655227. The next prime is 154720655267. The reversal of 154720655231 is 132556027451.

154720655231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 154720655231 - 2² = 154720655227 is a prime.

It is a super-2 number, since 2×154720655231² (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 (154720625231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49940561 + ... + 49943658.

It is an arithmetic number, because the mean of its divisors is an integer number (38705135250).

Almost surely, 2^154720655231 is an apocalyptic number.

154720655231 is a deficient number, since it is larger than the sum of its proper divisors (99885769).

154720655231 is an equidigital number, since it uses as much as digits as its factorization.

154720655231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99885768.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 154720655231 in words is "one hundred fifty-four billion, seven hundred twenty million, six hundred fifty-five thousand, two hundred thirty-one".