212045531 has 2 divisors, whose sum is σ = 212045532. Its totient is φ = 212045530.

The previous prime is 212045507. The next prime is 212045543. The reversal of 212045531 is 135540212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212045531 - 2¹⁰ = 212044507 is a prime.

It is a super-2 number, since 2×212045531² = 89926614434143922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212045497 and 212045506.

It is not a weakly prime, because it can be changed into another prime (212045501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106022765 + 106022766.

It is an arithmetic number, because the mean of its divisors is an integer number (106022766).

Almost surely, 2^212045531 is an apocalyptic number.

212045531 is a deficient number, since it is larger than the sum of its proper divisors (1).

212045531 is an equidigital number, since it uses as much as digits as its factorization.

212045531 is an evil number, because the sum of its binary digits is even.

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

The square root of 212045531 is about 14561.7832355794. The cubic root of 212045531 is about 596.3158796919.

Adding to 212045531 its reverse (135540212), we get a palindrome (347585743).

The spelling of 212045531 in words is "two hundred twelve million, forty-five thousand, five hundred thirty-one".