515416421 has 16 divisors (see below), whose sum is σ = 588772800. Its totient is φ = 446976768.

The previous prime is 515416417. The next prime is 515416423. The reversal of 515416421 is 124614515.

It is a cyclic number.

It is not a de Polignac number, because 515416421 - 2² = 515416417 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 (515416423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143870 + ... + 147408.

It is an arithmetic number, because the mean of its divisors is an integer number (36798300).

Almost surely, 2^515416421 is an apocalyptic number.

It is an amenable number.

515416421 is a deficient number, since it is larger than the sum of its proper divisors (73356379).

515416421 is a wasteful number, since it uses less digits than its factorization.

515416421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228.

The product of its digits is 4800, while the sum is 29.

The square root of 515416421 is about 22702.7844327519. The cubic root of 515416421 is about 801.7754427763.

The spelling of 515416421 in words is "five hundred fifteen million, four hundred sixteen thousand, four hundred twenty-one".