2621212425 has 72 divisors (see below), whose sum is σ = 5113344600. Its totient is φ = 1275816960.

The previous prime is 2621212397. The next prime is 2621212427. The reversal of 2621212425 is 5242121262.

2621212425 is a `hidden beast` number, since 2 + 6 + 21 + 212 + 425 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 1914237504 + 706974921 = 43752^2 + 26589^2 .

It is not a de Polignac number, because 2621212425 - 2⁸ = 2621212169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2621212427) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 255291 + ... + 265359.

It is an arithmetic number, because the mean of its divisors is an integer number (71018675).

Almost surely, 2^2621212425 is an apocalyptic number.

2621212425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2621212425 is a deficient number, since it is larger than the sum of its proper divisors (2492132175).

2621212425 is a wasteful number, since it uses less digits than its factorization.

2621212425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187 (or 10179 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2621212425 is about 51197.7775396550. Note that the first 3 decimals coincide. The cubic root of 2621212425 is about 1378.7983001179.

Adding to 2621212425 its reverse (5242121262), we get a palindrome (7863333687).

The spelling of 2621212425 in words is "two billion, six hundred twenty-one million, two hundred twelve thousand, four hundred twenty-five".