631142026 has 4 divisors (see below), whose sum is σ = 946713042. Its totient is φ = 315571012.

The previous prime is 631142023. The next prime is 631142027. The reversal of 631142026 is 620241136.

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

It can be written as a sum of positive squares in only one way, i.e., 325766401 + 305375625 = 18049^2 + 17475^2 .

It is not an unprimeable number, because it can be changed into a prime (631142021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157785505 + ... + 157785508.

Almost surely, 2^631142026 is an apocalyptic number.

631142026 is a deficient number, since it is larger than the sum of its proper divisors (315571016).

631142026 is a wasteful number, since it uses less digits than its factorization.

631142026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315571015.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 631142026 is about 25122.5401979975. The cubic root of 631142026 is about 857.7795730956.

The spelling of 631142026 in words is "six hundred thirty-one million, one hundred forty-two thousand, twenty-six".