215401325 has 24 divisors (see below), whose sum is σ = 281493888. Its totient is φ = 163183680.

The previous prime is 215401313. The next prime is 215401327. The reversal of 215401325 is 523104512.

It is not a de Polignac number, because 215401325 - 2¹⁰ = 215400301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 215401325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215401327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57407 + ... + 61043.

It is an arithmetic number, because the mean of its divisors is an integer number (11728912).

Almost surely, 2^215401325 is an apocalyptic number.

215401325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215401325 is a deficient number, since it is larger than the sum of its proper divisors (66092563).

215401325 is a wasteful number, since it uses less digits than its factorization.

215401325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773 (or 3768 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 215401325 is about 14676.5569872501. The cubic root of 215401325 is about 599.4451583724.

Adding to 215401325 its reverse (523104512), we get a palindrome (738505837).

The spelling of 215401325 in words is "two hundred fifteen million, four hundred one thousand, three hundred twenty-five".