5131654421 has 2 divisors, whose sum is σ = 5131654422. Its totient is φ = 5131654420.

The previous prime is 5131654417. The next prime is 5131654427. The reversal of 5131654421 is 1244561315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3900627025 + 1231027396 = 62455^2 + 35086^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131654421 - 2² = 5131654417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5131654427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565827210 + 2565827211.

It is an arithmetic number, because the mean of its divisors is an integer number (2565827211).

Almost surely, 2^5131654421 is an apocalyptic number.

It is an amenable number.

5131654421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5131654421 is an equidigital number, since it uses as much as digits as its factorization.

5131654421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 5131654421 is about 71635.5667318965. The cubic root of 5131654421 is about 1724.8545052389.

The spelling of 5131654421 in words is "five billion, one hundred thirty-one million, six hundred fifty-four thousand, four hundred twenty-one".