1012523431 has 4 divisors (see below), whose sum is σ = 1012692664. Its totient is φ = 1012354200.

The previous prime is 1012523419. The next prime is 1012523443. The reversal of 1012523431 is 1343252101.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1012523419) and next prime (1012523443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012523431 is a prime.

It is a super-2 number, since 2×1012523431² = 2050407396648023522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010523431) 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, 75300 + ... + 87721.

It is an arithmetic number, because the mean of its divisors is an integer number (253173166).

Almost surely, 2^1012523431 is an apocalyptic number.

1012523431 is a deficient number, since it is larger than the sum of its proper divisors (169233).

1012523431 is an equidigital number, since it uses as much as digits as its factorization.

1012523431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169232.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1012523431 is about 31820.1733339088. The cubic root of 1012523431 is about 1004.1571709813.

Adding to 1012523431 its reverse (1343252101), we get a palindrome (2355775532).

The spelling of 1012523431 in words is "one billion, twelve million, five hundred twenty-three thousand, four hundred thirty-one".