120553531 has 4 divisors (see below), whose sum is σ = 137775472. Its totient is φ = 103331592.

The previous prime is 120553529. The next prime is 120553567. The reversal of 120553531 is 135355021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 120553531 - 2¹ = 120553529 is a prime.

It is a super-2 number, since 2×120553531² = 29066307673135922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120553496 and 120553505.

It is not an unprimeable number, because it can be changed into a prime (120553231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8610960 + ... + 8610973.

It is an arithmetic number, because the mean of its divisors is an integer number (34443868).

Almost surely, 2^120553531 is an apocalyptic number.

120553531 is a deficient number, since it is larger than the sum of its proper divisors (17221941).

120553531 is an equidigital number, since it uses as much as digits as its factorization.

120553531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17221940.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 120553531 is about 10979.6871995517. The cubic root of 120553531 is about 493.9996544223. Note that the first 3 decimals are identical.

The spelling of 120553531 in words is "one hundred twenty million, five hundred fifty-three thousand, five hundred thirty-one".