11531455504215 has 32 divisors (see below), whose sum is σ = 18801860273856. Its totient is φ = 6032974571520.

The previous prime is 11531455504211. The next prime is 11531455504277. The reversal of 11531455504215 is 51240555413511.

It is not a de Polignac number, because 11531455504215 - 2² = 11531455504211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531455504211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3075577 + ... + 5702813.

It is an arithmetic number, because the mean of its divisors is an integer number (587558133558).

Almost surely, 2^{11531455504215} is an apocalyptic number.

11531455504215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11531455504215 is a deficient number, since it is larger than the sum of its proper divisors (7270404769641).

11531455504215 is a wasteful number, since it uses less digits than its factorization.

11531455504215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632819.

The product of its (nonzero) digits is 300000, while the sum is 42.

The spelling of 11531455504215 in words is "eleven trillion, five hundred thirty-one billion, four hundred fifty-five million, five hundred four thousand, two hundred fifteen".