1620152215 has 16 divisors (see below), whose sum is σ = 2123896320. Its totient is φ = 1176642720.

The previous prime is 1620152201. The next prime is 1620152243. The reversal of 1620152215 is 5122510261.

It is a de Polignac number, because none of the positive numbers 2^k-1620152215 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1620152215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19726 + ... + 60244.

It is an arithmetic number, because the mean of its divisors is an integer number (132743520).

Almost surely, 2^1620152215 is an apocalyptic number.

1620152215 is a deficient number, since it is larger than the sum of its proper divisors (503744105).

1620152215 is a wasteful number, since it uses less digits than its factorization.

1620152215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41262.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1620152215 is about 40251.1144566209. The cubic root of 1620152215 is about 1174.4970752467.

Adding to 1620152215 its reverse (5122510261), we get a palindrome (6742662476).

The spelling of 1620152215 in words is "one billion, six hundred twenty million, one hundred fifty-two thousand, two hundred fifteen".