1013172431 has 4 divisors (see below), whose sum is σ = 1015370664. Its totient is φ = 1010974200.

The previous prime is 1013172427. The next prime is 1013172437. The reversal of 1013172431 is 1342713101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1013172431 - 2² = 1013172427 is a prime.

It is a super-2 number, since 2×1013172431² = 2053036749876899522, 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 = 1013172397 and 1013172406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013172437) 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 in 3 ways as a sum of consecutive naturals, for example, 1098425 + ... + 1099346.

It is an arithmetic number, because the mean of its divisors is an integer number (253842666).

Almost surely, 2^1013172431 is an apocalyptic number.

1013172431 is a deficient number, since it is larger than the sum of its proper divisors (2198233).

1013172431 is an equidigital number, since it uses as much as digits as its factorization.

1013172431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198232.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1013172431 is about 31830.3696334177. The cubic root of 1013172431 is about 1004.3716709765.

Adding to 1013172431 its reverse (1342713101), we get a palindrome (2355885532).

The spelling of 1013172431 in words is "one billion, thirteen million, one hundred seventy-two thousand, four hundred thirty-one".