3213515156440 has 128 divisors (see below), whose sum is σ = 8246282526720. Its totient is φ = 1119865190400.

The previous prime is 3213515156429. The next prime is 3213515156459. The reversal of 3213515156440 is 446515153123.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 3213515156393 and 3213515156402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2829156 + ... + 3798835.

It is an arithmetic number, because the mean of its divisors is an integer number (64424082240).

Almost surely, 2^{3213515156440} is an apocalyptic number.

It is an amenable number.

3213515156440 is an abundant number, since it is smaller than the sum of its proper divisors (5032767370280).

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

3213515156440 is a wasteful number, since it uses less digits than its factorization.

3213515156440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628073 (or 6628069 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 3213515156440 in words is "three trillion, two hundred thirteen billion, five hundred fifteen million, one hundred fifty-six thousand, four hundred forty".