125531313 has 16 divisors (see below), whose sum is σ = 171714816. Its totient is φ = 81534080.

The previous prime is 125531279. The next prime is 125531321. The reversal of 125531313 is 313135521.

It is a cyclic number.

It is not a de Polignac number, because 125531313 - 2⁸ = 125531057 is a prime.

It is a super-2 number, since 2×125531313² = 31516221087007938, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125531333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30943 + ... + 34763.

It is an arithmetic number, because the mean of its divisors is an integer number (10732176).

Almost surely, 2^125531313 is an apocalyptic number.

It is an amenable number.

125531313 is a deficient number, since it is larger than the sum of its proper divisors (46183503).

125531313 is a wasteful number, since it uses less digits than its factorization.

125531313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104.

The product of its digits is 1350, while the sum is 24.

The square root of 125531313 is about 11204.0757316255. The cubic root of 125531313 is about 500.7074159866.

Adding to 125531313 its reverse (313135521), we get a palindrome (438666834).

The spelling of 125531313 in words is "one hundred twenty-five million, five hundred thirty-one thousand, three hundred thirteen".