1515138315151 has 4 divisors (see below), whose sum is σ = 1564013744704. Its totient is φ = 1466262885600.

The previous prime is 1515138315149. The next prime is 1515138315161.

It is a happy number.

1515138315151 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1515138315151 - 2¹ = 1515138315149 is a prime.

It is a super-2 number, since 2×1515138315151² (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 (1515138315161) 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, 24437714730 + ... + 24437714791.

It is an arithmetic number, because the mean of its divisors is an integer number (391003436176).

Almost surely, 2^{1515138315151} is an apocalyptic number.

1515138315151 is a deficient number, since it is larger than the sum of its proper divisors (48875429553).

1515138315151 is an equidigital number, since it uses as much as digits as its factorization.

1515138315151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48875429552.

The product of its digits is 45000, while the sum is 40.

The spelling of 1515138315151 in words is "one trillion, five hundred fifteen billion, one hundred thirty-eight million, three hundred fifteen thousand, one hundred fifty-one".