1520216653213 has 4 divisors (see below), whose sum is σ = 1520252340700. Its totient is φ = 1520180965728.

The previous prime is 1520216653139. The next prime is 1520216653217. The reversal of 1520216653213 is 3123566120251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1334919119769 + 185297533444 = 1155387^2 + 430462^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520216653213 - 2¹³ = 1520216645021 is a prime.

It is a super-2 number, since 2×1520216653213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520216653217) 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, 17779770 + ... + 17865067.

It is an arithmetic number, because the mean of its divisors is an integer number (380063085175).

Almost surely, 2^{1520216653213} is an apocalyptic number.

It is an amenable number.

1520216653213 is a deficient number, since it is larger than the sum of its proper divisors (35687487).

1520216653213 is an equidigital number, since it uses as much as digits as its factorization.

1520216653213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35687486.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 1520216653213 in words is "one trillion, five hundred twenty billion, two hundred sixteen million, six hundred fifty-three thousand, two hundred thirteen".