1020323231555 has 8 divisors (see below), whose sum is σ = 1229468326944. Its totient is φ = 812871619200.

The previous prime is 1020323231413. The next prime is 1020323231567. The reversal of 1020323231555 is 5551323230201.

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

It is not a de Polignac number, because 1020323231555 - 2¹² = 1020323227459 is a prime.

It is a Duffinian number.

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, 423369431 + ... + 423371840.

It is an arithmetic number, because the mean of its divisors is an integer number (153683540868).

Almost surely, 2^{1020323231555} is an apocalyptic number.

1020323231555 is a deficient number, since it is larger than the sum of its proper divisors (209145095389).

1020323231555 is an equidigital number, since it uses as much as digits as its factorization.

1020323231555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846741517.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 1020323231555 its reverse (5551323230201), we get a palindrome (6571646461756).

The spelling of 1020323231555 in words is "one trillion, twenty billion, three hundred twenty-three million, two hundred thirty-one thousand, five hundred fifty-five".