2531005421 has 8 divisors (see below), whose sum is σ = 2992321920. Its totient is φ = 2094625008.

The previous prime is 2531005417. The next prime is 2531005429. The reversal of 2531005421 is 1245001352.

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

It is not a de Polignac number, because 2531005421 - 2² = 2531005417 is a prime.

It is a super-2 number, since 2×2531005421² = 12811976882262774482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531005429) 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, 6233801 + ... + 6234206.

It is an arithmetic number, because the mean of its divisors is an integer number (374040240).

Almost surely, 2^2531005421 is an apocalyptic number.

It is an amenable number.

2531005421 is a deficient number, since it is larger than the sum of its proper divisors (461316499).

2531005421 is a wasteful number, since it uses less digits than its factorization.

2531005421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12468043.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2531005421 is about 50309.0987893840. The cubic root of 2531005421 is about 1362.7965489350.

Adding to 2531005421 its reverse (1245001352), we get a palindrome (3776006773).

The spelling of 2531005421 in words is "two billion, five hundred thirty-one million, five thousand, four hundred twenty-one".