215030243531 has 2 divisors, whose sum is σ = 215030243532. Its totient is φ = 215030243530.

The previous prime is 215030243513. The next prime is 215030243537. The reversal of 215030243531 is 135342030512.

It is a happy number.

Together with previous prime (215030243513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215030243531 is a prime.

It is a super-2 number, since 2×215030243531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215030243494 and 215030243503.

It is not a weakly prime, because it can be changed into another prime (215030243537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107515121765 + 107515121766.

It is an arithmetic number, because the mean of its divisors is an integer number (107515121766).

Almost surely, 2^215030243531 is an apocalyptic number.

215030243531 is a deficient number, since it is larger than the sum of its proper divisors (1).

215030243531 is an equidigital number, since it uses as much as digits as its factorization.

215030243531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 215030243531 in words is "two hundred fifteen billion, thirty million, two hundred forty-three thousand, five hundred thirty-one".