515321464 has 32 divisors (see below), whose sum is σ = 1105643520. Its totient is φ = 220575456.

The previous prime is 515321461. The next prime is 515321537. The reversal of 515321464 is 464123515.

It is a happy number.

It is a super-2 number, since 2×515321464² = 531112422518206592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515321461) 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, 42997 + ... + 53659.

It is an arithmetic number, because the mean of its divisors is an integer number (34551360).

Almost surely, 2^515321464 is an apocalyptic number.

It is an amenable number.

515321464 is an abundant number, since it is smaller than the sum of its proper divisors (590322056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515321464 is a wasteful number, since it uses less digits than its factorization.

515321464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11539 (or 11535 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 515321464 is about 22700.6930290685. The cubic root of 515321464 is about 801.7262017720.

Adding to 515321464 its reverse (464123515), we get a palindrome (979444979).

The spelling of 515321464 in words is "five hundred fifteen million, three hundred twenty-one thousand, four hundred sixty-four".