2021061625 has 32 divisors (see below), whose sum is σ = 2756198016. Its totient is φ = 1467400000.

The previous prime is 2021061607. The next prime is 2021061631. The reversal of 2021061625 is 5261601202.

It is not a de Polignac number, because 2021061625 - 2⁵ = 2021061593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 2021061625.

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, 1392150 + ... + 1393600.

It is an arithmetic number, because the mean of its divisors is an integer number (86131188).

Almost surely, 2^2021061625 is an apocalyptic number.

2021061625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021061625 is a deficient number, since it is larger than the sum of its proper divisors (735136391).

2021061625 is a wasteful number, since it uses less digits than its factorization.

2021061625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2021061625 is about 44956.2189802479. The cubic root of 2021061625 is about 1264.3282794538.

Adding to 2021061625 its reverse (5261601202), we get a palindrome (7282662827).

The spelling of 2021061625 in words is "two billion, twenty-one million, sixty-one thousand, six hundred twenty-five".