1051231321530 has 512 divisors, whose sum is σ = 3145551252480. Its totient is φ = 248170659840.

The previous prime is 1051231321523. The next prime is 1051231321549. The reversal of 1051231321530 is 351231321501.

1051231321530 is a `hidden beast` number, since 1 + 0 + 5 + 123 + 1 + 3 + 2 + 1 + 530 = 666.

It is a super-2 number, since 2×1051231321530² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1051231321494 and 1051231321503.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3587820064 + ... + 3587820356.

It is an arithmetic number, because the mean of its divisors is an integer number (6143654790).

Almost surely, 2^{1051231321530} is an apocalyptic number.

1051231321530 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 1051231321530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572775626240).

1051231321530 is an abundant number, since it is smaller than the sum of its proper divisors (2094319930950).

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

1051231321530 is a wasteful number, since it uses less digits than its factorization.

1051231321530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The spelling of 1051231321530 in words is "one trillion, fifty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, five hundred thirty".