1213552400430 has 128 divisors (see below), whose sum is σ = 3117506641920. Its totient is φ = 301436311680.

The previous prime is 1213552400429. The next prime is 1213552400453. The reversal of 1213552400430 is 340042553121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14811637 + ... + 14893343.

It is an arithmetic number, because the mean of its divisors is an integer number (24355520640).

Almost surely, 2^{1213552400430} is an apocalyptic number.

1213552400430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213552400430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558753320960).

1213552400430 is an abundant number, since it is smaller than the sum of its proper divisors (1903954241490).

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

1213552400430 is a wasteful number, since it uses less digits than its factorization.

1213552400430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82174.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1213552400430 its reverse (340042553121), we get a palindrome (1553594953551).

The spelling of 1213552400430 in words is "one trillion, two hundred thirteen billion, five hundred fifty-two million, four hundred thousand, four hundred thirty".