21413102831 has 2 divisors, whose sum is σ = 21413102832. Its totient is φ = 21413102830.

The previous prime is 21413102813. The next prime is 21413102849. The reversal of 21413102831 is 13820131412.

Together with previous prime (21413102813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (21413102813) and next prime (21413102849).

It is a cyclic number.

It is not a de Polignac number, because 21413102831 - 2²² = 21408908527 is a prime.

It is a super-2 number, since 2×21413102831² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21413102831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21413102881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706551415 + 10706551416.

It is an arithmetic number, because the mean of its divisors is an integer number (10706551416).

Almost surely, 2^21413102831 is an apocalyptic number.

21413102831 is a deficient number, since it is larger than the sum of its proper divisors (1).

21413102831 is an equidigital number, since it uses as much as digits as its factorization.

21413102831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 21413102831 in words is "twenty-one billion, four hundred thirteen million, one hundred two thousand, eight hundred thirty-one".