231621131027 has 8 divisors (see below), whose sum is σ = 272114335920. Its totient is φ = 194367382560.

The previous prime is 231621131003. The next prime is 231621131051. The reversal of 231621131027 is 720131126132.

It is an interprime number because it is at equal distance from previous prime (231621131003) and next prime (231621131051).

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

It is not a de Polignac number, because 231621131027 - 2⁸ = 231621130771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231621131527) 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, 809863952 + ... + 809864237.

It is an arithmetic number, because the mean of its divisors is an integer number (34014291990).

Almost surely, 2^231621131027 is an apocalyptic number.

231621131027 is a deficient number, since it is larger than the sum of its proper divisors (40493204893).

231621131027 is a wasteful number, since it uses less digits than its factorization.

231621131027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619728213.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 231621131027 its reverse (720131126132), we get a palindrome (951752257159).

The spelling of 231621131027 in words is "two hundred thirty-one billion, six hundred twenty-one million, one hundred thirty-one thousand, twenty-seven".