1213044158 has 8 divisors (see below), whose sum is σ = 1819714152. Its totient is φ = 606472776.

The previous prime is 1213044143. The next prime is 1213044181. The reversal of 1213044158 is 8514403121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1213044158² = 2942952258515857928, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213044158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34241 + ... + 59987.

It is an arithmetic number, because the mean of its divisors is an integer number (227464269).

Almost surely, 2^1213044158 is an apocalyptic number.

1213044158 is a deficient number, since it is larger than the sum of its proper divisors (606669994).

1213044158 is a wasteful number, since it uses less digits than its factorization.

1213044158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49306.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1213044158 is about 34828.7834699979. The cubic root of 1213044158 is about 1066.4951141858.

Adding to 1213044158 its reverse (8514403121), we get a palindrome (9727447279).

The spelling of 1213044158 in words is "one billion, two hundred thirteen million, forty-four thousand, one hundred fifty-eight".