1720230031 has 4 divisors (see below), whose sum is σ = 1852555432. Its totient is φ = 1587904632.

The previous prime is 1720229969. The next prime is 1720230041. The reversal of 1720230031 is 1300320271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1300320271 = 19 ⋅68437909.

It is a cyclic number.

It is not a de Polignac number, because 1720230031 - 2⁹ = 1720229519 is a prime.

It is a super-2 number, since 2×1720230031² = 5918382719108521922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1720229990 and 1720230008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720230041) 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, 66162681 + ... + 66162706.

It is an arithmetic number, because the mean of its divisors is an integer number (463138858).

Almost surely, 2^1720230031 is an apocalyptic number.

1720230031 is a deficient number, since it is larger than the sum of its proper divisors (132325401).

1720230031 is a wasteful number, since it uses less digits than its factorization.

1720230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132325400.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 1720230031 is about 41475.6558839038. The cubic root of 1720230031 is about 1198.1986934968.

The spelling of 1720230031 in words is "one billion, seven hundred twenty million, two hundred thirty thousand, thirty-one".