151815541 has 2 divisors, whose sum is σ = 151815542. Its totient is φ = 151815540.

The previous prime is 151815539. The next prime is 151815607. The reversal of 151815541 is 145518151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 27604516 = 11145^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 151815541 - 2¹ = 151815539 is a prime.

Together with 151815539, it forms a pair of twin primes.

It is equal to p_8540671 and since 151815541 and 8540671 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151810541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75907770 + 75907771.

It is an arithmetic number, because the mean of its divisors is an integer number (75907771).

Almost surely, 2^151815541 is an apocalyptic number.

It is an amenable number.

151815541 is a deficient number, since it is larger than the sum of its proper divisors (1).

151815541 is an equidigital number, since it uses as much as digits as its factorization.

151815541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000, while the sum is 31.

The square root of 151815541 is about 12321.3449347058. The cubic root of 151815541 is about 533.4643604721.

The spelling of 151815541 in words is "one hundred fifty-one million, eight hundred fifteen thousand, five hundred forty-one".