215400455130 has 128 divisors (see below), whose sum is σ = 606354997248. Its totient is φ = 47946028032.

The previous prime is 215400455099. The next prime is 215400455147. The reversal of 215400455130 is 31554004512.

It is a super-2 number, since 2×215400455130² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3007719 + ... + 3078501.

It is an arithmetic number, because the mean of its divisors is an integer number (4737148416).

Almost surely, 2^215400455130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215400455130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303177498624).

215400455130 is an abundant number, since it is smaller than the sum of its proper divisors (390954542118).

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

215400455130 is a wasteful number, since it uses less digits than its factorization.

215400455130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71180.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 215400455130 its reverse (31554004512), we get a palindrome (246954459642).

The spelling of 215400455130 in words is "two hundred fifteen billion, four hundred million, four hundred fifty-five thousand, one hundred thirty".