151007561 has 4 divisors (see below), whose sum is σ = 151061652. Its totient is φ = 150953472.

The previous prime is 151007539. The next prime is 151007599. The reversal of 151007561 is 165700151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132250000 + 18757561 = 11500^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 151007561 - 2²² = 146813257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 151007561.

It is not an unprimeable number, because it can be changed into a prime (151007531) 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, 22616 + ... + 28521.

It is an arithmetic number, because the mean of its divisors is an integer number (37765413).

Almost surely, 2^151007561 is an apocalyptic number.

It is an amenable number.

151007561 is a deficient number, since it is larger than the sum of its proper divisors (54091).

151007561 is an equidigital number, since it uses as much as digits as its factorization.

151007561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54090.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 151007561 is about 12288.5133763202. The cubic root of 151007561 is about 532.5162900672.

The spelling of 151007561 in words is "one hundred fifty-one million, seven thousand, five hundred sixty-one".