215469397500 has 240 divisors, whose sum is σ = 719019840000. Its totient is φ = 49180320000.

The previous prime is 215469397487. The next prime is 215469397501. The reversal of 215469397500 is 5793964512.

215469397500 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215469397500² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215469397501) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 43100001 + ... + 43104999.

It is an arithmetic number, because the mean of its divisors is an integer number (2995916000).

Almost surely, 2^215469397500 is an apocalyptic number.

215469397500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215469397500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359509920000).

215469397500 is an abundant number, since it is smaller than the sum of its proper divisors (503550442500).

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

215469397500 is a wasteful number, since it uses less digits than its factorization.

215469397500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5854 (or 5837 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 215469397500 in words is "two hundred fifteen billion, four hundred sixty-nine million, three hundred ninety-seven thousand, five hundred".