240152561 has 4 divisors (see below), whose sum is σ = 261984624. Its totient is φ = 218320500.

The previous prime is 240152551. The next prime is 240152579. The reversal of 240152561 is 165251042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240152561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240152561.

It is not an unprimeable number, because it can be changed into a prime (240152501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10916015 + ... + 10916036.

It is an arithmetic number, because the mean of its divisors is an integer number (65496156).

Almost surely, 2^240152561 is an apocalyptic number.

It is an amenable number.

240152561 is a deficient number, since it is larger than the sum of its proper divisors (21832063).

240152561 is a wasteful number, since it uses less digits than its factorization.

240152561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21832062.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 240152561 is about 15496.8564876881. The cubic root of 240152561 is about 621.5781517710.

The spelling of 240152561 in words is "two hundred forty million, one hundred fifty-two thousand, five hundred sixty-one".