21542614031 has 2 divisors, whose sum is σ = 21542614032. Its totient is φ = 21542614030.

The previous prime is 21542614003. The next prime is 21542614073. The reversal of 21542614031 is 13041624512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21542614031 - 2¹⁴ = 21542597647 is a prime.

It is a super-2 number, since 2×21542614031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21542613985 and 21542614003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21542694031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10771307015 + 10771307016.

It is an arithmetic number, because the mean of its divisors is an integer number (10771307016).

Almost surely, 2^21542614031 is an apocalyptic number.

21542614031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21542614031 is an equidigital number, since it uses as much as digits as its factorization.

21542614031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21542614031 in words is "twenty-one billion, five hundred forty-two million, six hundred fourteen thousand, thirty-one".