2542374735221 has 4 divisors (see below), whose sum is σ = 2691926190252. Its totient is φ = 2392823280192.

The previous prime is 2542374735211. The next prime is 2542374735227. The reversal of 2542374735221 is 1225374732452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2072560450321 + 469814284900 = 1439639^2 + 685430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542374735221 - 2⁶ = 2542374735157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542374735227) 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, 74775727490 + ... + 74775727523.

It is an arithmetic number, because the mean of its divisors is an integer number (672981547563).

Almost surely, 2^{2542374735221} is an apocalyptic number.

It is an amenable number.

2542374735221 is a deficient number, since it is larger than the sum of its proper divisors (149551455031).

2542374735221 is a wasteful number, since it uses less digits than its factorization.

2542374735221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149551455030.

The product of its digits is 2822400, while the sum is 47.

The spelling of 2542374735221 in words is "two trillion, five hundred forty-two billion, three hundred seventy-four million, seven hundred thirty-five thousand, two hundred twenty-one".