1620525212 has 12 divisors (see below), whose sum is σ = 2845040016. Its totient is φ = 807656640.

The previous prime is 1620525209. The next prime is 1620525227. The reversal of 1620525212 is 2125250261.

It is a super-2 number, since 2×1620525212² = 5252203925455289888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650093 + ... + 652580.

It is an arithmetic number, because the mean of its divisors is an integer number (237086668).

Almost surely, 2^1620525212 is an apocalyptic number.

It is an amenable number.

1620525212 is a deficient number, since it is larger than the sum of its proper divisors (1224514804).

1620525212 is a wasteful number, since it uses less digits than its factorization.

1620525212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302988 (or 1302986 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1620525212 is about 40255.7475647888. The cubic root of 1620525212 is about 1174.5872005791.

Adding to 1620525212 its reverse (2125250261), we get a palindrome (3745775473).

The spelling of 1620525212 in words is "one billion, six hundred twenty million, five hundred twenty-five thousand, two hundred twelve".