1213306510 has 32 divisors (see below), whose sum is σ = 2354375520. Its totient is φ = 447527808.

The previous prime is 1213306499. The next prime is 1213306513. The reversal of 1213306510 is 156033121.

It is a happy number.

It is a super-2 number, since 2×1213306510² = 2944225374416760200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213306513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137821 + ... + 146359.

It is an arithmetic number, because the mean of its divisors is an integer number (73574235).

Almost surely, 2^1213306510 is an apocalyptic number.

1213306510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213306510 is a deficient number, since it is larger than the sum of its proper divisors (1141069010).

1213306510 is a wasteful number, since it uses less digits than its factorization.

1213306510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1213306510 is about 34832.5495765096. The cubic root of 1213306510 is about 1066.5719943102.

Adding to 1213306510 its reverse (156033121), we get a palindrome (1369339631).

The spelling of 1213306510 in words is "one billion, two hundred thirteen million, three hundred six thousand, five hundred ten".