1655051015 has 4 divisors (see below), whose sum is σ = 1986061224. Its totient is φ = 1324040808.

The previous prime is 1655051009. The next prime is 1655051017. The reversal of 1655051015 is 5101505561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5101505561 = 71 ⋅71852191.

It is a cyclic number.

It is not a de Polignac number, because 1655051015 - 2¹⁴ = 1655034631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655051017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165505097 + ... + 165505106.

It is an arithmetic number, because the mean of its divisors is an integer number (496515306).

Almost surely, 2^1655051015 is an apocalyptic number.

1655051015 is a deficient number, since it is larger than the sum of its proper divisors (331010209).

1655051015 is an equidigital number, since it uses as much as digits as its factorization.

1655051015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331010208.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 1655051015 is about 40682.3182107411. The cubic root of 1655051015 is about 1182.8703022562.

Adding to 1655051015 its reverse (5101505561), we get a palindrome (6756556576).

The spelling of 1655051015 in words is "one billion, six hundred fifty-five million, fifty-one thousand, fifteen".