2051222543 has 4 divisors (see below), whose sum is σ = 2051590800. Its totient is φ = 2050854288.

The previous prime is 2051222531. The next prime is 2051222587. The reversal of 2051222543 is 3452221502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3452221502 = 2 ⋅1726110751.

It is a cyclic number.

It is not a de Polignac number, because 2051222543 - 2⁶ = 2051222479 is a prime.

It is a super-2 number, since 2×2051222543² = 8415027841822773698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051225543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175643 + ... + 186956.

It is an arithmetic number, because the mean of its divisors is an integer number (512897700).

Almost surely, 2^2051222543 is an apocalyptic number.

2051222543 is a deficient number, since it is larger than the sum of its proper divisors (368257).

2051222543 is an equidigital number, since it uses as much as digits as its factorization.

2051222543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368256.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2051222543 is about 45290.4244073734. The cubic root of 2051222543 is about 1270.5865691026.

The spelling of 2051222543 in words is "two billion, fifty-one million, two hundred twenty-two thousand, five hundred forty-three".