1513372054021 has 4 divisors (see below), whose sum is σ = 1514446130700. Its totient is φ = 1512297977344.

The previous prime is 1513372054013. The next prime is 1513372054037. The reversal of 1513372054021 is 1204502733151.

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 125124912900 + 1388247141121 = 353730^2 + 1178239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513372054021 - 2³ = 1513372054013 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 (1513372054091) 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, 537036226 + ... + 537039043.

It is an arithmetic number, because the mean of its divisors is an integer number (378611532675).

Almost surely, 2^{1513372054021} is an apocalyptic number.

It is an amenable number.

1513372054021 is a deficient number, since it is larger than the sum of its proper divisors (1074076679).

1513372054021 is a wasteful number, since it uses less digits than its factorization.

1513372054021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074076678.

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 1513372054021 its reverse (1204502733151), we get a palindrome (2717874787172).

The spelling of 1513372054021 in words is "one trillion, five hundred thirteen billion, three hundred seventy-two million, fifty-four thousand, twenty-one".