1213553241 has 24 divisors (see below), whose sum is σ = 1807097760. Its totient is φ = 784403136.

The previous prime is 1213553221. The next prime is 1213553281. The reversal of 1213553241 is 1423553121.

1213553241 is a `hidden beast` number, since 121 + 3 + 5 + 532 + 4 + 1 = 666.

It is not a de Polignac number, because 1213553241 - 2⁹ = 1213552729 is a prime.

It is a super-2 number, since 2×1213553241² = 2945422937483208162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213553221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23110 + ... + 54416.

It is an arithmetic number, because the mean of its divisors is an integer number (75295740).

Almost surely, 2^1213553241 is an apocalyptic number.

It is an amenable number.

1213553241 is a deficient number, since it is larger than the sum of its proper divisors (593544519).

1213553241 is a wasteful number, since it uses less digits than its factorization.

1213553241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31445 (or 31442 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1213553241 is about 34836.0910694642. The cubic root of 1213553241 is about 1066.6442867158.

The spelling of 1213553241 in words is "one billion, two hundred thirteen million, five hundred fifty-three thousand, two hundred forty-one".