215712707425 has 6 divisors (see below), whose sum is σ = 267483757238. Its totient is φ = 172570165920.

The previous prime is 215712707417. The next prime is 215712707461. The reversal of 215712707425 is 524707217512.

It can be written as a sum of positive squares in 3 ways, for example, as 9922550544 + 205790156881 = 99612^2 + 453641^2 .

It is not a de Polignac number, because 215712707425 - 2³ = 215712707417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4314254124 + ... + 4314254173.

Almost surely, 2^215712707425 is an apocalyptic number.

215712707425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215712707425 is a deficient number, since it is larger than the sum of its proper divisors (51771049813).

215712707425 is an equidigital number, since it uses as much as digits as its factorization.

215712707425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628508307 (or 8628508302 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 43.

The spelling of 215712707425 in words is "two hundred fifteen billion, seven hundred twelve million, seven hundred seven thousand, four hundred twenty-five".