510540421 has 4 divisors (see below), whose sum is σ = 510848352. Its totient is φ = 510232492.

The previous prime is 510540383. The next prime is 510540427. The reversal of 510540421 is 124045015.

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 510540421 - 2¹³ = 510532229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 510540392 and 510540401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (510540427) 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, 151465 + ... + 154798.

It is an arithmetic number, because the mean of its divisors is an integer number (127712088).

Almost surely, 2^510540421 is an apocalyptic number.

It is an amenable number.

510540421 is a deficient number, since it is larger than the sum of its proper divisors (307931).

510540421 is a wasteful number, since it uses less digits than its factorization.

510540421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307930.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 510540421 is about 22595.1415352947. The cubic root of 510540421 is about 799.2390790828.

Adding to 510540421 its reverse (124045015), we get a palindrome (634585436).

The spelling of 510540421 in words is "five hundred ten million, five hundred forty thousand, four hundred twenty-one".