2542724221531 has 8 divisors (see below), whose sum is σ = 2740462747344. Its totient is φ = 2345292032160.

The previous prime is 2542724221519. The next prime is 2542724221537. The reversal of 2542724221531 is 1351224272452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2542724221531 - 2²⁷ = 2542590003803 is a prime.

It is a super-2 number, since 2×2542724221531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542724221537) 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, 76566865 + ... + 76600066.

It is an arithmetic number, because the mean of its divisors is an integer number (342557843418).

Almost surely, 2^{2542724221531} is an apocalyptic number.

2542724221531 is a deficient number, since it is larger than the sum of its proper divisors (197738525813).

2542724221531 is a wasteful number, since it uses less digits than its factorization.

2542724221531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153168221.

The product of its digits is 268800, while the sum is 40.

Adding to 2542724221531 its reverse (1351224272452), we get a palindrome (3893948493983).

The spelling of 2542724221531 in words is "two trillion, five hundred forty-two billion, seven hundred twenty-four million, two hundred twenty-one thousand, five hundred thirty-one".