155715473 has 2 divisors, whose sum is σ = 155715474. Its totient is φ = 155715472.

The previous prime is 155715463. The next prime is 155715487. The reversal of 155715473 is 374517551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85692049 + 70023424 = 9257^2 + 8368^2 .

It is an emirp because it is prime and its reverse (374517551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155715473 - 2⁴ = 155715457 is a prime.

It is a super-2 number, since 2×155715473² = 48494617063227458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155715463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77857736 + 77857737.

It is an arithmetic number, because the mean of its divisors is an integer number (77857737).

Almost surely, 2^155715473 is an apocalyptic number.

It is an amenable number.

155715473 is a deficient number, since it is larger than the sum of its proper divisors (1).

155715473 is an equidigital number, since it uses as much as digits as its factorization.

155715473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73500, while the sum is 38.

The square root of 155715473 is about 12478.6006026317. The cubic root of 155715473 is about 537.9937822602.

The spelling of 155715473 in words is "one hundred fifty-five million, seven hundred fifteen thousand, four hundred seventy-three".