2131215512240 has 40 divisors (see below), whose sum is σ = 4955189685360. Its totient is φ = 852466657536.

The previous prime is 2131215512197. The next prime is 2131215512243. The reversal of 2131215512240 is 422155121312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2131215512240² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131215512243) 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, 3499727 + ... + 4063313.

It is an arithmetic number, because the mean of its divisors is an integer number (123879742134).

Almost surely, 2^{2131215512240} is an apocalyptic number.

2131215512240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131215512240 is an abundant number, since it is smaller than the sum of its proper divisors (2823974173120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131215512240 is a wasteful number, since it uses less digits than its factorization.

2131215512240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610869 (or 610863 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 2131215512240 in words is "two trillion, one hundred thirty-one billion, two hundred fifteen million, five hundred twelve thousand, two hundred forty".