101431031 has 4 divisors (see below), whose sum is σ = 109233432. Its totient is φ = 93628632.

The previous prime is 101431021. The next prime is 101431049. The reversal of 101431031 is 130134101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101431031 is a prime.

It is a super-2 number, since 2×101431031² = 20576508099445922, 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 = 101430997 and 101431015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101431021) 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, 3901181 + ... + 3901206.

It is an arithmetic number, because the mean of its divisors is an integer number (27308358).

Almost surely, 2^101431031 is an apocalyptic number.

101431031 is a deficient number, since it is larger than the sum of its proper divisors (7802401).

101431031 is an equidigital number, since it uses as much as digits as its factorization.

101431031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7802400.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 101431031 is about 10071.2973841507. The cubic root of 101431031 is about 466.3624909521.

Adding to 101431031 its reverse (130134101), we get a palindrome (231565132).

The spelling of 101431031 in words is "one hundred one million, four hundred thirty-one thousand, thirty-one".