1213550541 has 24 divisors (see below), whose sum is σ = 2090424960. Its totient is φ = 663306336.

The previous prime is 1213550483. The next prime is 1213550549. The reversal of 1213550541 is 1450553121.

1213550541 is a `hidden beast` number, since 121 + 35 + 505 + 4 + 1 = 666.

It is not a de Polignac number, because 1213550541 - 2¹³ = 1213542349 is a prime.

It is a super-2 number, since 2×1213550541² = 2945409831122785362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213550549) 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, 417306 + ... + 420203.

It is an arithmetic number, because the mean of its divisors is an integer number (87101040).

Almost surely, 2^1213550541 is an apocalyptic number.

It is an amenable number.

1213550541 is a deficient number, since it is larger than the sum of its proper divisors (876874419).

1213550541 is a wasteful number, since it uses less digits than its factorization.

1213550541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837545 (or 837542 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1213550541 is about 34836.0523165298. The cubic root of 1213550541 is about 1066.6434956664.

The spelling of 1213550541 in words is "one billion, two hundred thirteen million, five hundred fifty thousand, five hundred forty-one".