2051155252 has 6 divisors (see below), whose sum is σ = 3589521698. Its totient is φ = 1025577624.

The previous prime is 2051155243. The next prime is 2051155313. The reversal of 2051155252 is 2525511502.

It can be written as a sum of positive squares in only one way, i.e., 1474867216 + 576288036 = 38404^2 + 24006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2051155252.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 256394403 + ... + 256394410.

Almost surely, 2^2051155252 is an apocalyptic number.

It is an amenable number.

2051155252 is a deficient number, since it is larger than the sum of its proper divisors (1538366446).

2051155252 is a wasteful number, since it uses less digits than its factorization.

2051155252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512788817 (or 512788815 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 2051155252 is about 45289.6815179793. The cubic root of 2051155252 is about 1270.5726749535.

Adding to 2051155252 its reverse (2525511502), we get a palindrome (4576666754).

The spelling of 2051155252 in words is "two billion, fifty-one million, one hundred fifty-five thousand, two hundred fifty-two".