215138619332 has 288 divisors, whose sum is σ = 508359962880. Its totient is φ = 78721735680.

The previous prime is 215138619301. The next prime is 215138619341. The reversal of 215138619332 is 233916831512.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 776673578 + ... + 776673854.

It is an arithmetic number, because the mean of its divisors is an integer number (1765138760).

Almost surely, 2^215138619332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215138619332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254179981440).

215138619332 is an abundant number, since it is smaller than the sum of its proper divisors (293221343548).

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

215138619332 is a wasteful number, since it uses less digits than its factorization.

215138619332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 642 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The spelling of 215138619332 in words is "two hundred fifteen billion, one hundred thirty-eight million, six hundred nineteen thousand, three hundred thirty-two".