1214515220 has 24 divisors (see below), whose sum is σ = 2609797344. Its totient is φ = 474507936.

The previous prime is 1214515219. The next prime is 1214515223. The reversal of 1214515220 is 225154121.

It is a super-2 number, since 2×1214515220² = 2950094439223296800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214515223) 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, 705254 + ... + 706973.

It is an arithmetic number, because the mean of its divisors is an integer number (108741556).

Almost surely, 2^1214515220 is an apocalyptic number.

1214515220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1214515220 is an abundant number, since it is smaller than the sum of its proper divisors (1395282124).

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

1214515220 is a wasteful number, since it uses less digits than its factorization.

1214515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412279 (or 1412277 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1214515220 is about 34849.8955522108. The cubic root of 1214515220 is about 1066.9260538888.

Adding to 1214515220 its reverse (225154121), we get a palindrome (1439669341).

The spelling of 1214515220 in words is "one billion, two hundred fourteen million, five hundred fifteen thousand, two hundred twenty".