648851031 has 12 divisors (see below), whose sum is σ = 939746808. Its totient is φ = 431405424.

The previous prime is 648851023. The next prime is 648851033. The reversal of 648851031 is 130158846.

648851031 is a `hidden beast` number, since 64 + 88 + 510 + 3 + 1 = 666.

It is not a de Polignac number, because 648851031 - 2³ = 648851023 is a prime.

It is a super-2 number, since 2×648851031² = 842015320859525922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648851033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93285 + ... + 99998.

It is an arithmetic number, because the mean of its divisors is an integer number (78312234).

Almost surely, 2^648851031 is an apocalyptic number.

648851031 is a deficient number, since it is larger than the sum of its proper divisors (290895777).

648851031 is a wasteful number, since it uses less digits than its factorization.

648851031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193662 (or 193659 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 648851031 is about 25472.5544655419. The cubic root of 648851031 is about 865.7284033460.

The spelling of 648851031 in words is "six hundred forty-eight million, eight hundred fifty-one thousand, thirty-one".