515251503212 has 6 divisors (see below), whose sum is σ = 901690130628. Its totient is φ = 257625751604.

The previous prime is 515251503197. The next prime is 515251503229. The reversal of 515251503212 is 212305152515.

It is a super-2 number, since 2×515251503212² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64406437898 + ... + 64406437905.

It is an arithmetic number, because the mean of its divisors is an integer number (150281688438).

Almost surely, 2^515251503212 is an apocalyptic number.

It is an amenable number.

515251503212 is a deficient number, since it is larger than the sum of its proper divisors (386438627416).

515251503212 is a wasteful number, since it uses less digits than its factorization.

515251503212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128812875807 (or 128812875805 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 515251503212 its reverse (212305152515), we get a palindrome (727556655727).

The spelling of 515251503212 in words is "five hundred fifteen billion, two hundred fifty-one million, five hundred three thousand, two hundred twelve".