231431400031 has 8 divisors (see below), whose sum is σ = 251439426000. Its totient is φ = 211738461312.

The previous prime is 231431400029. The next prime is 231431400037. The reversal of 231431400031 is 130004134132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231431400031 - 2¹ = 231431400029 is a prime.

It is a super-2 number, since 2×231431400031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231431399975 and 231431400011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231431400037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78770281 + ... + 78773218.

It is an arithmetic number, because the mean of its divisors is an integer number (31429928250).

Almost surely, 2^231431400031 is an apocalyptic number.

231431400031 is a deficient number, since it is larger than the sum of its proper divisors (20008025969).

231431400031 is a wasteful number, since it uses less digits than its factorization.

231431400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157543625.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231431400031 its reverse (130004134132), we get a palindrome (361435534163).

The spelling of 231431400031 in words is "two hundred thirty-one billion, four hundred thirty-one million, four hundred thousand, thirty-one".