154220431 has 2 divisors, whose sum is σ = 154220432. Its totient is φ = 154220430.

The previous prime is 154220401. The next prime is 154220453. The reversal of 154220431 is 134022451.

It is an a-pointer prime, because the next prime (154220453) can be obtained adding 154220431 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154220431 is a prime.

It is a super-2 number, since 2×154220431² = 47567882675651522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154220401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77110215 + 77110216.

It is an arithmetic number, because the mean of its divisors is an integer number (77110216).

Almost surely, 2^154220431 is an apocalyptic number.

154220431 is a deficient number, since it is larger than the sum of its proper divisors (1).

154220431 is an equidigital number, since it uses as much as digits as its factorization.

154220431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 154220431 is about 12418.5518882034. The cubic root of 154220431 is about 536.2664624748.

Adding to 154220431 its reverse (134022451), we get a palindrome (288242882).

The spelling of 154220431 in words is "one hundred fifty-four million, two hundred twenty thousand, four hundred thirty-one".