215445897131 has 8 divisors (see below), whose sum is σ = 221773918464. Its totient is φ = 209201690880.

The previous prime is 215445897103. The next prime is 215445897151. The reversal of 215445897131 is 131798544512.

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

It is a cyclic number.

It is not a de Polignac number, because 215445897131 - 2¹⁴ = 215445880747 is a prime.

It is a super-2 number, since 2×215445897131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215445897131.

It is not an unprimeable number, because it can be changed into a prime (215445897151) 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, 20948555 + ... + 20958836.

It is an arithmetic number, because the mean of its divisors is an integer number (27721739808).

Almost surely, 2^215445897131 is an apocalyptic number.

215445897131 is a deficient number, since it is larger than the sum of its proper divisors (6328021333).

215445897131 is an equidigital number, since it uses as much as digits as its factorization.

215445897131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41907541.

The product of its digits is 1209600, while the sum is 50.

The spelling of 215445897131 in words is "two hundred fifteen billion, four hundred forty-five million, eight hundred ninety-seven thousand, one hundred thirty-one".