1251533212 has 6 divisors (see below), whose sum is σ = 2190183128. Its totient is φ = 625766604.

The previous prime is 1251533191. The next prime is 1251533233. The reversal of 1251533212 is 2123351521.

It is an interprime number because it is at equal distance from previous prime (1251533191) and next prime (1251533233).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156441648 + ... + 156441655.

Almost surely, 2^1251533212 is an apocalyptic number.

It is an amenable number.

1251533212 is a deficient number, since it is larger than the sum of its proper divisors (938649916).

1251533212 is a wasteful number, since it uses less digits than its factorization.

1251533212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312883307 (or 312883305 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 1251533212 is about 35377.0153065518. The cubic root of 1251533212 is about 1077.6575924163.

Adding to 1251533212 its reverse (2123351521), we get a palindrome (3374884733).

The spelling of 1251533212 in words is "one billion, two hundred fifty-one million, five hundred thirty-three thousand, two hundred twelve".