1531212063 has 4 divisors (see below), whose sum is σ = 2041616088. Its totient is φ = 1020808040.

The previous prime is 1531212061. The next prime is 1531212091. The reversal of 1531212063 is 3602121351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3602121351 = 3 ⋅1200707117.

It is a cyclic number.

It is not a de Polignac number, because 1531212063 - 2¹ = 1531212061 is a prime.

It is a super-2 number, since 2×1531212063² = 4689220763753431938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531212061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255202008 + ... + 255202013.

It is an arithmetic number, because the mean of its divisors is an integer number (510404022).

Almost surely, 2^1531212063 is an apocalyptic number.

1531212063 is a deficient number, since it is larger than the sum of its proper divisors (510404025).

1531212063 is an equidigital number, since it uses as much as digits as its factorization.

1531212063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510404024.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1531212063 is about 39130.7048620390. The cubic root of 1531212063 is about 1152.5995542355.

The spelling of 1531212063 in words is "one billion, five hundred thirty-one million, two hundred twelve thousand, sixty-three".