1520542655 has 4 divisors (see below), whose sum is σ = 1824651192. Its totient is φ = 1216434120.

The previous prime is 1520542649. The next prime is 1520542657. The reversal of 1520542655 is 5562450251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5562450251 = 16087 ⋅345773.

It is not a de Polignac number, because 1520542655 - 2⁸ = 1520542399 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 (1520542657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152054261 + ... + 152054270.

It is an arithmetic number, because the mean of its divisors is an integer number (456162798).

Almost surely, 2^1520542655 is an apocalyptic number.

1520542655 is a deficient number, since it is larger than the sum of its proper divisors (304108537).

1520542655 is an equidigital number, since it uses as much as digits as its factorization.

1520542655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304108536.

The product of its (nonzero) digits is 60000, while the sum is 35.

The square root of 1520542655 is about 38994.1361617359. The cubic root of 1520542655 is about 1149.9162270419.

The spelling of 1520542655 in words is "one billion, five hundred twenty million, five hundred forty-two thousand, six hundred fifty-five".