145551031 has 2 divisors, whose sum is σ = 145551032. Its totient is φ = 145551030.

The previous prime is 145551019. The next prime is 145551047. The reversal of 145551031 is 130155541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145551031 - 2⁹ = 145550519 is a prime.

It is a super-2 number, since 2×145551031² = 42370205250325922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145550987 and 145551005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145551011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72775515 + 72775516.

It is an arithmetic number, because the mean of its divisors is an integer number (72775516).

Almost surely, 2^145551031 is an apocalyptic number.

145551031 is a deficient number, since it is larger than the sum of its proper divisors (1).

145551031 is an equidigital number, since it uses as much as digits as its factorization.

145551031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 145551031 is about 12064.4531993787. The cubic root of 145551031 is about 526.0234379239.

It can be divided in two parts, 1455510 and 31, that added together give a palindrome (1455541).

The spelling of 145551031 in words is "one hundred forty-five million, five hundred fifty-one thousand, thirty-one".