2051221440434 has 4 divisors (see below), whose sum is σ = 3076832160654. Its totient is φ = 1025610720216.

The previous prime is 2051221440419. The next prime is 2051221440469. The reversal of 2051221440434 is 4340441221502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1876667107225 + 174554333209 = 1369915^2 + 417797^2 .

It is a super-2 number, since 2×2051221440434² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2051221440434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512805360107 + ... + 512805360110.

Almost surely, 2^{2051221440434} is an apocalyptic number.

2051221440434 is a deficient number, since it is larger than the sum of its proper divisors (1025610720220).

2051221440434 is a wasteful number, since it uses less digits than its factorization.

2051221440434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025610720219.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 2051221440434 its reverse (4340441221502), we get a palindrome (6391662661936).

The spelling of 2051221440434 in words is "two trillion, fifty-one billion, two hundred twenty-one million, four hundred forty thousand, four hundred thirty-four".