631051 has 4 divisors (see below), whose sum is σ = 658512. Its totient is φ = 603592.

The previous prime is 631039. The next prime is 631061. The reversal of 631051 is 150136.

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

It is a cyclic number.

It is not a de Polignac number, because 631051 - 2¹¹ = 629003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13696 + ... + 13741.

It is an arithmetic number, because the mean of its divisors is an integer number (164628).

2⁶³¹⁰⁵¹ is an apocalyptic number.

631051 is a deficient number, since it is larger than the sum of its proper divisors (27461).

631051 is a wasteful number, since it uses less digits than its factorization.

631051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27460.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 631051 is about 794.3871851937. The cubic root of 631051 is about 85.7738333568.

Adding to 631051 its reverse (150136), we get a palindrome (781187).

The spelling of 631051 in words is "six hundred thirty-one thousand, fifty-one".