631143545 has 8 divisors (see below), whose sum is σ = 775845000. Its totient is φ = 492599680.

The previous prime is 631143511. The next prime is 631143563. The reversal of 631143545 is 545341136.

It can be written as a sum of positive squares in 4 ways, for example, as 43178041 + 587965504 = 6571^2 + 24248^2 .

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

It is not a de Polignac number, because 631143545 - 2⁶ = 631143481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539170 + ... + 1539579.

It is an arithmetic number, because the mean of its divisors is an integer number (96980625).

Almost surely, 2^631143545 is an apocalyptic number.

It is an amenable number.

631143545 is a deficient number, since it is larger than the sum of its proper divisors (144701455).

631143545 is a wasteful number, since it uses less digits than its factorization.

631143545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078795.

The product of its digits is 21600, while the sum is 32.

The square root of 631143545 is about 25122.5704297948. The cubic root of 631143545 is about 857.7802612483.

The spelling of 631143545 in words is "six hundred thirty-one million, one hundred forty-three thousand, five hundred forty-five".