215431545993 has 8 divisors (see below), whose sum is σ = 287602468608. Its totient is φ = 143440827024.

The previous prime is 215431545983. The next prime is 215431545997. The reversal of 215431545993 is 399545134512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215431545993 - 2⁶ = 215431545929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215431545997) 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, 45048121 + ... + 45052902.

It is an arithmetic number, because the mean of its divisors is an integer number (35950308576).

Almost surely, 2^215431545993 is an apocalyptic number.

It is an amenable number.

215431545993 is a deficient number, since it is larger than the sum of its proper divisors (72170922615).

215431545993 is an equidigital number, since it uses as much as digits as its factorization.

215431545993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90101823.

The product of its digits is 2916000, while the sum is 51.

The spelling of 215431545993 in words is "two hundred fifteen billion, four hundred thirty-one million, five hundred forty-five thousand, nine hundred ninety-three".