151040561 has 4 divisors (see below), whose sum is σ = 172617792. Its totient is φ = 129463332.

The previous prime is 151040507. The next prime is 151040627. The reversal of 151040561 is 165040151.

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 not a de Polignac number, because 151040561 - 2¹⁸ = 150778417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151043561) 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, 10788605 + ... + 10788618.

It is an arithmetic number, because the mean of its divisors is an integer number (43154448).

Almost surely, 2^151040561 is an apocalyptic number.

It is an amenable number.

151040561 is a deficient number, since it is larger than the sum of its proper divisors (21577231).

151040561 is an equidigital number, since it uses as much as digits as its factorization.

151040561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21577230.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 151040561 is about 12289.8560203120. The cubic root of 151040561 is about 532.5550778769. Note that the first 3 decimals are identical.

The spelling of 151040561 in words is "one hundred fifty-one million, forty thousand, five hundred sixty-one".