1531384215011 has 8 divisors (see below), whose sum is σ = 1750171315200. Its totient is φ = 1312601596488.

The previous prime is 1531384214959. The next prime is 1531384215013. The reversal of 1531384215011 is 1105124831351.

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

It is a de Polignac number, because none of the positive numbers 2^k-1531384215011 is a prime.

It is a super-2 number, since 2×1531384215011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1531384215013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353171 + ... + 1785356.

It is an arithmetic number, because the mean of its divisors is an integer number (218771414400).

Almost surely, 2^{1531384215011} is an apocalyptic number.

1531384215011 is a deficient number, since it is larger than the sum of its proper divisors (218787100189).

1531384215011 is a wasteful number, since it uses less digits than its factorization.

1531384215011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240833.

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 1531384215011 in words is "one trillion, five hundred thirty-one billion, three hundred eighty-four million, two hundred fifteen thousand, eleven".