145773031 has 4 divisors (see below), whose sum is σ = 146383200. Its totient is φ = 145162864.

The previous prime is 145773029. The next prime is 145773041. The reversal of 145773031 is 130377541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130377541 = 7 ⋅18625363.

It is not a de Polignac number, because 145773031 - 2¹ = 145773029 is a prime.

It is a super-2 number, since 2×145773031² = 42499553133853922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145772984 and 145773002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145773041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304726 + ... + 305203.

It is an arithmetic number, because the mean of its divisors is an integer number (36595800).

Almost surely, 2^145773031 is an apocalyptic number.

145773031 is a deficient number, since it is larger than the sum of its proper divisors (610169).

145773031 is an equidigital number, since it uses as much as digits as its factorization.

145773031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610168.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 145773031 is about 12073.6502765319. The cubic root of 145773031 is about 526.2907390935.

The spelling of 145773031 in words is "one hundred forty-five million, seven hundred seventy-three thousand, thirty-one".