101031431 has 4 divisors (see below), whose sum is σ = 101052864. Its totient is φ = 101010000.

The previous prime is 101031419. The next prime is 101031451. The reversal of 101031431 is 134130101.

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-101031431 is a prime.

It is a super-2 number, since 2×101031431² = 20414700099815522, 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 (101031451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (25263216).

Almost surely, 2^101031431 is an apocalyptic number.

101031431 is a deficient number, since it is larger than the sum of its proper divisors (21433).

101031431 is an equidigital number, since it uses as much as digits as its factorization.

101031431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21432.

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

The square root of 101031431 is about 10051.4392501771. The cubic root of 101031431 is about 465.7492541747.

Adding to 101031431 its reverse (134130101), we get a palindrome (235161532).

The spelling of 101031431 in words is "one hundred one million, thirty-one thousand, four hundred thirty-one".