2051005156 has 24 divisors (see below), whose sum is σ = 3698868096. Its totient is φ = 994486080.

The previous prime is 2051005147. The next prime is 2051005157. The reversal of 2051005156 is 6515001502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051005156.

It is not an unprimeable number, because it can be changed into a prime (2051005157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10056 + ... + 64831.

It is an arithmetic number, because the mean of its divisors is an integer number (154119504).

Almost surely, 2^2051005156 is an apocalyptic number.

It is an amenable number.

2051005156 is a deficient number, since it is larger than the sum of its proper divisors (1647862940).

2051005156 is a wasteful number, since it uses less digits than its factorization.

2051005156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75099 (or 75097 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 2051005156 is about 45288.0244214737. The cubic root of 2051005156 is about 1270.5416822519.

Adding to 2051005156 its reverse (6515001502), we get a palindrome (8566006658).

The spelling of 2051005156 in words is "two billion, fifty-one million, five thousand, one hundred fifty-six".