631540006 has 4 divisors (see below), whose sum is σ = 947310012. Its totient is φ = 315770002.

The previous prime is 631539977. The next prime is 631540027. The reversal of 631540006 is 600045136.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157885000 + ... + 157885003.

It is an arithmetic number, because the mean of its divisors is an integer number (236827503).

Almost surely, 2^631540006 is an apocalyptic number.

631540006 is a deficient number, since it is larger than the sum of its proper divisors (315770006).

631540006 is a wasteful number, since it uses less digits than its factorization.

631540006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315770005.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 631540006 is about 25130.4597252020. The cubic root of 631540006 is about 857.9598322507.

The spelling of 631540006 in words is "six hundred thirty-one million, five hundred forty thousand, six".