120243531 has 16 divisors (see below), whose sum is σ = 164160000. Its totient is φ = 78253728.

The previous prime is 120243527. The next prime is 120243551. The reversal of 120243531 is 135342021.

It is not a de Polignac number, because 120243531 - 2² = 120243527 is a prime.

It is a super-2 number, since 2×120243531² = 28917013494695922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120243498 and 120243507.

It is not an unprimeable number, because it can be changed into a prime (120243521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69505 + ... + 71213.

It is an arithmetic number, because the mean of its divisors is an integer number (10260000).

Almost surely, 2^120243531 is an apocalyptic number.

120243531 is a deficient number, since it is larger than the sum of its proper divisors (43916469).

120243531 is a wasteful number, since it uses less digits than its factorization.

120243531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 120243531 is about 10965.5611347527. The cubic root of 120243531 is about 493.5758555660.

Adding to 120243531 its reverse (135342021), we get a palindrome (255585552).

The spelling of 120243531 in words is "one hundred twenty million, two hundred forty-three thousand, five hundred thirty-one".