1630645031 has 8 divisors (see below), whose sum is σ = 1701805680. Its totient is φ = 1560479872.

The previous prime is 1630645013. The next prime is 1630645033. The reversal of 1630645031 is 1305460361.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630645031 is a prime.

It is a super-2 number, since 2×1630645031² = 5318006434249981922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630644985 and 1630645003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630645033) 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, 245525 + ... + 252078.

It is an arithmetic number, because the mean of its divisors is an integer number (212725710).

Almost surely, 2^1630645031 is an apocalyptic number.

1630645031 is a deficient number, since it is larger than the sum of its proper divisors (71160649).

1630645031 is a wasteful number, since it uses less digits than its factorization.

1630645031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497745.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1630645031 is about 40381.2460308000. The cubic root of 1630645031 is about 1177.0271404600.

The spelling of 1630645031 in words is "one billion, six hundred thirty million, six hundred forty-five thousand, thirty-one".