631781241 has 32 divisors (see below), whose sum is σ = 1060899840. Its totient is φ = 325491264.

The previous prime is 631781239. The next prime is 631781243. The reversal of 631781241 is 142187136.

It is an interprime number because it is at equal distance from previous prime (631781239) and next prime (631781243).

It is not a de Polignac number, because 631781241 - 2¹ = 631781239 is a prime.

It is a super-3 number, since 3×631781241³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (631781243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15171 + ... + 38648.

It is an arithmetic number, because the mean of its divisors is an integer number (33153120).

Almost surely, 2^631781241 is an apocalyptic number.

It is an amenable number.

631781241 is a deficient number, since it is larger than the sum of its proper divisors (429118599).

631781241 is a wasteful number, since it uses less digits than its factorization.

631781241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53885.

The product of its digits is 8064, while the sum is 33.

The square root of 631781241 is about 25135.2589204886. The cubic root of 631781241 is about 858.0690592150.

The spelling of 631781241 in words is "six hundred thirty-one million, seven hundred eighty-one thousand, two hundred forty-one".