631106399 has 32 divisors (see below), whose sum is σ = 824947200. Its totient is φ = 468518400.

The previous prime is 631106383. The next prime is 631106449. The reversal of 631106399 is 993601136.

It is not a de Polignac number, because 631106399 - 2⁴ = 631106383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631106309) 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, 133427 + ... + 138075.

It is an arithmetic number, because the mean of its divisors is an integer number (25779600).

Almost surely, 2^631106399 is an apocalyptic number.

631106399 is a deficient number, since it is larger than the sum of its proper divisors (193840801).

631106399 is a wasteful number, since it uses less digits than its factorization.

631106399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 631106399 is about 25121.8311235467. The cubic root of 631106399 is about 857.7634326779.

The spelling of 631106399 in words is "six hundred thirty-one million, one hundred six thousand, three hundred ninety-nine".