155520146 has 8 divisors (see below), whose sum is σ = 233338764. Its totient is φ = 77740560.

The previous prime is 155520143. The next prime is 155520161. The reversal of 155520146 is 641025551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 144264121 + 11256025 = 12011^2 + 3355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×155520146² = 48373031623722632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155520143) 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, 4196 + ... + 18128.

Almost surely, 2^155520146 is an apocalyptic number.

155520146 is a deficient number, since it is larger than the sum of its proper divisors (77818618).

155520146 is a wasteful number, since it uses less digits than its factorization.

155520146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19516.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 155520146 is about 12470.7716681848. The cubic root of 155520146 is about 537.7687378700.

Adding to 155520146 its reverse (641025551), we get a palindrome (796545697).

The spelling of 155520146 in words is "one hundred fifty-five million, five hundred twenty thousand, one hundred forty-six".