1231554810115 has 80 divisors (see below), whose sum is σ = 1827010376352. Its totient is φ = 794156977152.

The previous prime is 1231554810103. The next prime is 1231554810127. The reversal of 1231554810115 is 5110184551321.

It is an interprime number because it is at equal distance from previous prime (1231554810103) and next prime (1231554810127).

It is not a de Polignac number, because 1231554810115 - 2⁷ = 1231554809987 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 405515377 + ... + 405518413.

Almost surely, 2^{1231554810115} is an apocalyptic number.

1231554810115 is a deficient number, since it is larger than the sum of its proper divisors (595455566237).

1231554810115 is an equidigital number, since it uses as much as digits as its factorization.

1231554810115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074 (or 5053 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 37.

The spelling of 1231554810115 in words is "one trillion, two hundred thirty-one billion, five hundred fifty-four million, eight hundred ten thousand, one hundred fifteen".