1215214455 has 96 divisors (see below), whose sum is σ = 2464862400. Its totient is φ = 506677248.

The previous prime is 1215214433. The next prime is 1215214471. The reversal of 1215214455 is 5544125121.

It is not a de Polignac number, because 1215214455 - 2⁶ = 1215214391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 849681 + ... + 851109.

It is an arithmetic number, because the mean of its divisors is an integer number (25675650).

Almost surely, 2^1215214455 is an apocalyptic number.

1215214455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215214455 is an abundant number, since it is smaller than the sum of its proper divisors (1249647945).

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

1215214455 is a wasteful number, since it uses less digits than its factorization.

1215214455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1546 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 1215214455 is about 34859.9262047412. The cubic root of 1215214455 is about 1067.1307690161.

Adding to 1215214455 its reverse (5544125121), we get a palindrome (6759339576).

The spelling of 1215214455 in words is "one billion, two hundred fifteen million, two hundred fourteen thousand, four hundred fifty-five".