241561551 has 64 divisors (see below), whose sum is σ = 429235200. Its totient is φ = 116981760.

The previous prime is 241561543. The next prime is 241561559. The reversal of 241561551 is 155165142.

It is an interprime number because it is at equal distance from previous prime (241561543) and next prime (241561559).

It is not a de Polignac number, because 241561551 - 2³ = 241561543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241561559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 537775 + ... + 538223.

It is an arithmetic number, because the mean of its divisors is an integer number (6706800).

Almost surely, 2^241561551 is an apocalyptic number.

241561551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

241561551 is a deficient number, since it is larger than the sum of its proper divisors (187673649).

241561551 is a wasteful number, since it uses less digits than its factorization.

241561551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624.

The product of its digits is 6000, while the sum is 30.

The square root of 241561551 is about 15542.2505127153. The cubic root of 241561551 is about 622.7913946801.

The spelling of 241561551 in words is "two hundred forty-one million, five hundred sixty-one thousand, five hundred fifty-one".