1022100645 has 32 divisors (see below), whose sum is σ = 1653696000. Its totient is φ = 539040320.

The previous prime is 1022100637. The next prime is 1022100671. The reversal of 1022100645 is 5460012201.

It is not a de Polignac number, because 1022100645 - 2³ = 1022100637 is a prime.

It is a super-3 number, since 3×1022100645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681106 + ... + 682604.

It is an arithmetic number, because the mean of its divisors is an integer number (51678000).

Almost surely, 2^1022100645 is an apocalyptic number.

1022100645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1022100645 is a deficient number, since it is larger than the sum of its proper divisors (631595355).

1022100645 is a wasteful number, since it uses less digits than its factorization.

1022100645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1022100645 is about 31970.3088036384. The cubic root of 1022100645 is about 1007.3132674059.

Adding to 1022100645 its reverse (5460012201), we get a palindrome (6482112846).

The spelling of 1022100645 in words is "one billion, twenty-two million, one hundred thousand, six hundred forty-five".