631051601 has 8 divisors (see below), whose sum is σ = 634596960. Its totient is φ = 627513408.

The previous prime is 631051591. The next prime is 631051633. The reversal of 631051601 is 106150136.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631051601 is a prime.

It is a super-2 number, since 2×631051601² = 796452246249326402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (631051651) 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, 337070 + ... + 338936.

It is an arithmetic number, because the mean of its divisors is an integer number (79324620).

Almost surely, 2^631051601 is an apocalyptic number.

It is an amenable number.

631051601 is a deficient number, since it is larger than the sum of its proper divisors (3545359).

631051601 is a wasteful number, since it uses less digits than its factorization.

631051601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 631051601 is about 25120.7404548512. The cubic root of 631051601 is about 857.7386058652.

The spelling of 631051601 in words is "six hundred thirty-one million, fifty-one thousand, six hundred one".