215040425 has 12 divisors (see below), whose sum is σ = 267000396. Its totient is φ = 171806400.

The previous prime is 215040403. The next prime is 215040457. The reversal of 215040425 is 524040512.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3279721 + 211760704 = 1811^2 + 14552^2 .

It is not a de Polignac number, because 215040425 - 2²⁰ = 213991849 is a prime.

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 215040425.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15287 + ... + 25763.

It is an arithmetic number, because the mean of its divisors is an integer number (22250033).

Almost surely, 2^215040425 is an apocalyptic number.

215040425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215040425 is a deficient number, since it is larger than the sum of its proper divisors (51959971).

215040425 is a wasteful number, since it uses less digits than its factorization.

215040425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11308 (or 11303 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 215040425 is about 14664.2567148833. The cubic root of 215040425 is about 599.1101856661.

Adding to 215040425 its reverse (524040512), we get a palindrome (739080937).

The spelling of 215040425 in words is "two hundred fifteen million, forty thousand, four hundred twenty-five".