2521629979 has 4 divisors (see below), whose sum is σ = 2750869080. Its totient is φ = 2292390880.

The previous prime is 2521629977. The next prime is 2521629989. The reversal of 2521629979 is 9799261252.

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

It is a cyclic number.

It is not a de Polignac number, because 2521629979 - 2¹ = 2521629977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521629977) 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, 114619534 + ... + 114619555.

It is an arithmetic number, because the mean of its divisors is an integer number (687717270).

Almost surely, 2^2521629979 is an apocalyptic number.

2521629979 is a deficient number, since it is larger than the sum of its proper divisors (229239101).

2521629979 is a wasteful number, since it uses less digits than its factorization.

2521629979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229239100.

The product of its digits is 1224720, while the sum is 52.

The square root of 2521629979 is about 50215.8339470729. The cubic root of 2521629979 is about 1361.1117601468. Note that the first 3 decimals are identical.

The spelling of 2521629979 in words is "two billion, five hundred twenty-one million, six hundred twenty-nine thousand, nine hundred seventy-nine".