2051543402 has 8 divisors (see below), whose sum is σ = 3079397412. Its totient is φ = 1025077600.

The previous prime is 2051543401. The next prime is 2051543419. The reversal of 2051543402 is 2043451502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1891293121 + 160250281 = 43489^2 + 12659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2051543401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343349 + ... + 349272.

Almost surely, 2^2051543402 is an apocalyptic number.

2051543402 is a deficient number, since it is larger than the sum of its proper divisors (1027854010).

2051543402 is a wasteful number, since it uses less digits than its factorization.

2051543402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694104.

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

The square root of 2051543402 is about 45293.9665076928. The cubic root of 2051543402 is about 1270.6528154301.

Adding to 2051543402 its reverse (2043451502), we get a palindrome (4094994904).

The spelling of 2051543402 in words is "two billion, fifty-one million, five hundred forty-three thousand, four hundred two".