238155925 has 18 divisors (see below), whose sum is σ = 343529538. Its totient is φ = 163306080.

The previous prime is 238155923. The next prime is 238155971. The reversal of 238155925 is 529551832.

It can be written as a sum of positive squares in 3 ways, for example, as 2502724 + 235653201 = 1582^2 + 15351^2 .

It is not a de Polignac number, because 238155925 - 2¹ = 238155923 is a prime.

It is a super-2 number, since 2×238155925² = 113436489225211250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238155923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 95982 + ... + 98431.

Almost surely, 2^238155925 is an apocalyptic number.

238155925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

238155925 is a deficient number, since it is larger than the sum of its proper divisors (105373613).

238155925 is a wasteful number, since it uses less digits than its factorization.

238155925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194437 (or 194425 counting only the distinct ones).

The product of its digits is 108000, while the sum is 40.

The square root of 238155925 is about 15432.3013513863. The cubic root of 238155925 is about 619.8507488468.

The spelling of 238155925 in words is "two hundred thirty-eight million, one hundred fifty-five thousand, nine hundred twenty-five".