1231501415355 has 24 divisors (see below), whose sum is σ = 2170782160560. Its totient is φ = 645668537280.

The previous prime is 1231501415321. The next prime is 1231501415387. The reversal of 1231501415355 is 5535141051321.

1231501415355 is a `hidden beast` number, since 1 + 2 + 31 + 50 + 1 + 41 + 535 + 5 = 666.

It is not a de Polignac number, because 1231501415355 - 2¹⁰ = 1231501414331 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231918516 + ... + 231923825.

It is an arithmetic number, because the mean of its divisors is an integer number (90449256690).

Almost surely, 2^{1231501415355} is an apocalyptic number.

1231501415355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231501415355 is a deficient number, since it is larger than the sum of its proper divisors (939280745205).

1231501415355 is a wasteful number, since it uses less digits than its factorization.

1231501415355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463842411 (or 463842408 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 1231501415355 its reverse (5535141051321), we get a palindrome (6766642466676).

The spelling of 1231501415355 in words is "one trillion, two hundred thirty-one billion, five hundred one million, four hundred fifteen thousand, three hundred fifty-five".