231645420040 has 32 divisors (see below), whose sum is σ = 530036136000. Its totient is φ = 91087689664.

The previous prime is 231645420029. The next prime is 231645420107. The reversal of 231645420040 is 40024546132.

It is a junction number, because it is equal to n+sod(n) for n = 231645419984 and 231645420011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49075060 + ... + 49079779.

It is an arithmetic number, because the mean of its divisors is an integer number (16563629250).

Almost surely, 2^231645420040 is an apocalyptic number.

231645420040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231645420040 is an abundant number, since it is smaller than the sum of its proper divisors (298390715960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231645420040 is a wasteful number, since it uses less digits than its factorization.

231645420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98154909 (or 98154905 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 231645420040 its reverse (40024546132), we get a palindrome (271669966172).

The spelling of 231645420040 in words is "two hundred thirty-one billion, six hundred forty-five million, four hundred twenty thousand, forty".