31426478225 has 6 divisors (see below), whose sum is σ = 38968833030. Its totient is φ = 25141182560.

The previous prime is 31426478221. The next prime is 31426478243. The reversal of 31426478225 is 52287462413.

It can be written as a sum of positive squares in 3 ways, for example, as 8714782609 + 22711695616 = 93353^2 + 150704^2 .

It is not a de Polignac number, because 31426478225 - 2² = 31426478221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31426478221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628529540 + ... + 628529589.

It is an arithmetic number, because the mean of its divisors is an integer number (6494805505).

Almost surely, 2^31426478225 is an apocalyptic number.

It is an amenable number.

31426478225 is a deficient number, since it is larger than the sum of its proper divisors (7542354805).

31426478225 is a wasteful number, since it uses less digits than its factorization.

31426478225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257059139 (or 1257059134 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The spelling of 31426478225 in words is "thirty-one billion, four hundred twenty-six million, four hundred seventy-eight thousand, two hundred twenty-five".