2151620530 has 8 divisors (see below), whose sum is σ = 3872916972. Its totient is φ = 860648208.

The previous prime is 2151620507. The next prime is 2151620543. The reversal of 2151620530 is 350261512.

2151620530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1899477889 + 252142641 = 43583^2 + 15879^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2151620495 and 2151620504.

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, 107581017 + ... + 107581036.

Almost surely, 2^2151620530 is an apocalyptic number.

2151620530 is a deficient number, since it is larger than the sum of its proper divisors (1721296442).

2151620530 is a wasteful number, since it uses less digits than its factorization.

2151620530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215162060.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2151620530 is about 46385.5638103063. The cubic root of 2151620530 is about 1290.9870717817.

The spelling of 2151620530 in words is "two billion, one hundred fifty-one million, six hundred twenty thousand, five hundred thirty".