155521552 has 10 divisors (see below), whose sum is σ = 301323038. Its totient is φ = 77760768.

The previous prime is 155521549. The next prime is 155521567. The reversal of 155521552 is 255125551.

It can be written as a sum of positive squares in only one way, i.e., 140280336 + 15241216 = 11844^2 + 3904^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860033 + ... + 4860064.

Almost surely, 2^155521552 is an apocalyptic number.

It is an amenable number.

155521552 is a deficient number, since it is larger than the sum of its proper divisors (145801486).

155521552 is an equidigital number, since it uses as much as digits as its factorization.

155521552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720105 (or 9720099 counting only the distinct ones).

The product of its digits is 12500, while the sum is 31.

The square root of 155521552 is about 12470.8280398697. The cubic root of 155521552 is about 537.7703584544.

The spelling of 155521552 in words is "one hundred fifty-five million, five hundred twenty-one thousand, five hundred fifty-two".