646055031 has 8 divisors (see below), whose sum is σ = 866565504. Its totient is φ = 428123960.

The previous prime is 646055021. The next prime is 646055051. The reversal of 646055031 is 130550646.

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

It is a cyclic number.

It is not a de Polignac number, because 646055031 - 2¹¹ = 646052983 is a prime.

It is a super-2 number, since 2×646055031² = 834774206160821922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646055031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646055021) 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, 644265 + ... + 645266.

It is an arithmetic number, because the mean of its divisors is an integer number (108320688).

Almost surely, 2^646055031 is an apocalyptic number.

646055031 is a deficient number, since it is larger than the sum of its proper divisors (220510473).

646055031 is a wasteful number, since it uses less digits than its factorization.

646055031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289701.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 646055031 is about 25417.6126140910. The cubic root of 646055031 is about 864.4830934429.

The spelling of 646055031 in words is "six hundred forty-six million, fifty-five thousand, thirty-one".