631503040 has 56 divisors (see below), whose sum is σ = 1718596512. Its totient is φ = 216514560.

The previous prime is 631503017. The next prime is 631503053. The reversal of 631503040 is 40305136.

It is a tau number, because it is divible by the number of its divisors (56).

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, 138721 + ... + 143200.

Almost surely, 2^631503040 is an apocalyptic number.

It is an amenable number.

631503040 is an abundant number, since it is smaller than the sum of its proper divisors (1087093472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631503040 is a wasteful number, since it uses less digits than its factorization.

631503040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281945 (or 281935 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 631503040 is about 25129.7242324702. The cubic root of 631503040 is about 857.9430922386.

Adding to 631503040 its reverse (40305136), we get a palindrome (671808176).

The spelling of 631503040 in words is "six hundred thirty-one million, five hundred three thousand, forty".