1516115121 has 4 divisors (see below), whose sum is σ = 2021486832. Its totient is φ = 1010743412.

The previous prime is 1516115119. The next prime is 1516115137. The reversal of 1516115121 is 1215116151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1516115121 - 2¹ = 1516115119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1516115091 and 1516115100.

It is not an unprimeable number, because it can be changed into a prime (1516115221) 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, 252685851 + ... + 252685856.

It is an arithmetic number, because the mean of its divisors is an integer number (505371708).

Almost surely, 2^1516115121 is an apocalyptic number.

It is an amenable number.

1516115121 is a deficient number, since it is larger than the sum of its proper divisors (505371711).

1516115121 is an equidigital number, since it uses as much as digits as its factorization.

1516115121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505371710.

The product of its digits is 300, while the sum is 24.

The square root of 1516115121 is about 38937.3229819411. The cubic root of 1516115121 is about 1148.7990287807.

The spelling of 1516115121 in words is "one billion, five hundred sixteen million, one hundred fifteen thousand, one hundred twenty-one".