63345531 has 8 divisors (see below), whose sum is σ = 85618000. Its totient is φ = 41651712.

The previous prime is 63345523. The next prime is 63345577. The reversal of 63345531 is 13554336.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63345531 - 2³ = 63345523 is a prime.

It is a super-2 number, since 2×63345531² = 8025312595343922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63345521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144406 + ... + 144843.

It is an arithmetic number, because the mean of its divisors is an integer number (10702250).

Almost surely, 2^63345531 is an apocalyptic number.

63345531 is a deficient number, since it is larger than the sum of its proper divisors (22272469).

63345531 is a wasteful number, since it uses less digits than its factorization.

63345531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289325.

The product of its digits is 16200, while the sum is 30.

The square root of 63345531 is about 7958.9905767000. The cubic root of 63345531 is about 398.6318486568.

Adding to 63345531 its reverse (13554336), we get a palindrome (76899867).

It can be divided in two parts, 633 and 45531, that added together give a palindrome (46164).

The spelling of 63345531 in words is "sixty-three million, three hundred forty-five thousand, five hundred thirty-one".