1215442453404 has 48 divisors (see below), whose sum is σ = 2897735533056. Its totient is φ = 396340857600.

The previous prime is 1215442453399. The next prime is 1215442453409. The reversal of 1215442453404 is 4043542445121.

It is an interprime number because it is at equal distance from previous prime (1215442453399) and next prime (1215442453409).

It is a super-2 number, since 2×1215442453404² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215442453409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696244 + ... + 1707524.

It is an arithmetic number, because the mean of its divisors is an integer number (60369490272).

Almost surely, 2^{1215442453404} is an apocalyptic number.

It is an amenable number.

1215442453404 is an abundant number, since it is smaller than the sum of its proper divisors (1682293079652).

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

1215442453404 is a wasteful number, since it uses less digits than its factorization.

1215442453404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013466 (or 1013464 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 39.

Adding to 1215442453404 its reverse (4043542445121), we get a palindrome (5258984898525).

The spelling of 1215442453404 in words is "one trillion, two hundred fifteen billion, four hundred forty-two million, four hundred fifty-three thousand, four hundred four".