2051562142242 has 160 divisors (see below), whose sum is σ = 4837522694400. Its totient is φ = 649028443392.

The previous prime is 2051562142229. The next prime is 2051562142277. The reversal of 2051562142242 is 2422412651502.

2051562142242 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 5 + 621 + 4 + 2 + 24 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2051562142197 and 2051562142206.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 208508359 + ... + 208518197.

It is an arithmetic number, because the mean of its divisors is an integer number (30234516840).

Almost surely, 2^{2051562142242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051562142242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2418761347200).

2051562142242 is an abundant number, since it is smaller than the sum of its proper divisors (2785960552158).

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

2051562142242 is a wasteful number, since it uses less digits than its factorization.

2051562142242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10742 (or 10733 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 2051562142242 its reverse (2422412651502), we get a palindrome (4473974793744).

The spelling of 2051562142242 in words is "two trillion, fifty-one billion, five hundred sixty-two million, one hundred forty-two thousand, two hundred forty-two".