1213150531 has 2 divisors, whose sum is σ = 1213150532. Its totient is φ = 1213150530.

The previous prime is 1213150501. The next prime is 1213150553. The reversal of 1213150531 is 1350513121.

It is an a-pointer prime, because the next prime (1213150553) can be obtained adding 1213150531 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213150531 - 2⁷ = 1213150403 is a prime.

It is a super-2 number, since 2×1213150531² = 2943468421731163922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213150501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606575265 + 606575266.

It is an arithmetic number, because the mean of its divisors is an integer number (606575266).

Almost surely, 2^1213150531 is an apocalyptic number.

1213150531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213150531 is an equidigital number, since it uses as much as digits as its factorization.

1213150531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1213150531 is about 34830.3105211538. The cubic root of 1213150531 is about 1066.5262872661.

Adding to 1213150531 its reverse (1350513121), we get a palindrome (2563663652).

The spelling of 1213150531 in words is "one billion, two hundred thirteen million, one hundred fifty thousand, five hundred thirty-one".