154155251231 has 2 divisors, whose sum is σ = 154155251232. Its totient is φ = 154155251230.

The previous prime is 154155251207. The next prime is 154155251329. The reversal of 154155251231 is 132152551451.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154155251231 is a prime.

It is a super-2 number, since 2×154155251231² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 154155251191 and 154155251200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154155257231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77077625615 + 77077625616.

It is an arithmetic number, because the mean of its divisors is an integer number (77077625616).

Almost surely, 2^154155251231 is an apocalyptic number.

154155251231 is a deficient number, since it is larger than the sum of its proper divisors (1).

154155251231 is an equidigital number, since it uses as much as digits as its factorization.

154155251231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30000, while the sum is 35.

The spelling of 154155251231 in words is "one hundred fifty-four billion, one hundred fifty-five million, two hundred fifty-one thousand, two hundred thirty-one".