215425413 has 30 divisors (see below), whose sum is σ = 374355366. Its totient is φ = 123097968.

The previous prime is 215425391. The next prime is 215425423. The reversal of 215425413 is 314524512.

It can be written as a sum of positive squares in only one way, i.e., 149377284 + 66048129 = 12222^2 + 8127^2 .

It is not a de Polignac number, because 215425413 - 2⁵ = 215425381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215425423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 23170 + ... + 31107.

Almost surely, 2^215425413 is an apocalyptic number.

It is an amenable number.

215425413 is a deficient number, since it is larger than the sum of its proper divisors (158929953).

215425413 is an equidigital number, since it uses as much as digits as its factorization.

215425413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54303 (or 54287 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 215425413 is about 14677.3775927446. The cubic root of 215425413 is about 599.4675025506.

Adding to 215425413 its reverse (314524512), we get a palindrome (529949925).

Subtracting 215425413 from its reverse (314524512), we obtain a palindrome (99099099).

The spelling of 215425413 in words is "two hundred fifteen million, four hundred twenty-five thousand, four hundred thirteen".