151904561 has 2 divisors, whose sum is σ = 151904562. Its totient is φ = 151904560.

The previous prime is 151904551. The next prime is 151904593. The reversal of 151904561 is 165409151.

It is an a-pointer prime, because the next prime (151904593) can be obtained adding 151904561 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150822961 + 1081600 = 12281^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 151904561 - 2¹⁸ = 151642417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (151904551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75952280 + 75952281.

It is an arithmetic number, because the mean of its divisors is an integer number (75952281).

Almost surely, 2^151904561 is an apocalyptic number.

It is an amenable number.

151904561 is a deficient number, since it is larger than the sum of its proper divisors (1).

151904561 is an equidigital number, since it uses as much as digits as its factorization.

151904561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 151904561 is about 12324.9568356242. The cubic root of 151904561 is about 533.5686091721.

The spelling of 151904561 in words is "one hundred fifty-one million, nine hundred four thousand, five hundred sixty-one".