146431031 has 2 divisors, whose sum is σ = 146431032. Its totient is φ = 146431030.

The previous prime is 146431001. The next prime is 146431037. The reversal of 146431031 is 130134641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 146431031 - 2¹⁴ = 146414647 is a prime.

It is a super-2 number, since 2×146431031² = 42884093679445922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 146430988 and 146431006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146431037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73215515 + 73215516.

It is an arithmetic number, because the mean of its divisors is an integer number (73215516).

Almost surely, 2^146431031 is an apocalyptic number.

146431031 is a deficient number, since it is larger than the sum of its proper divisors (1).

146431031 is an equidigital number, since it uses as much as digits as its factorization.

146431031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 146431031 is about 12100.8690183805. The cubic root of 146431031 is about 527.0814193198.

Adding to 146431031 its reverse (130134641), we get a palindrome (276565672).

The spelling of 146431031 in words is "one hundred forty-six million, four hundred thirty-one thousand, thirty-one".