515143321421 has 8 divisors (see below), whose sum is σ = 516106076544. Its totient is φ = 514181304000.

The previous prime is 515143321379. The next prime is 515143321549. The reversal of 515143321421 is 124123341515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 515143321421 - 2¹⁴ = 515143305037 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 (515143381421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223510 + ... + 1589736.

It is an arithmetic number, because the mean of its divisors is an integer number (64513259568).

Almost surely, 2^515143321421 is an apocalyptic number.

It is an amenable number.

515143321421 is a deficient number, since it is larger than the sum of its proper divisors (962755123).

515143321421 is a wasteful number, since it uses less digits than its factorization.

515143321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368851.

The product of its digits is 14400, while the sum is 32.

Adding to 515143321421 its reverse (124123341515), we get a palindrome (639266662936).

The spelling of 515143321421 in words is "five hundred fifteen billion, one hundred forty-three million, three hundred twenty-one thousand, four hundred twenty-one".