155512402 has 4 divisors (see below), whose sum is σ = 233268606. Its totient is φ = 77756200.

The previous prime is 155512393. The next prime is 155512429. The reversal of 155512402 is 204215551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 144216081 + 11296321 = 12009^2 + 3361^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38878099 + ... + 38878102.

Almost surely, 2^155512402 is an apocalyptic number.

155512402 is a deficient number, since it is larger than the sum of its proper divisors (77756204).

155512402 is an equidigital number, since it uses as much as digits as its factorization.

155512402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77756203.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 155512402 is about 12470.4611783206. The cubic root of 155512402 is about 537.7598118019.

Adding to 155512402 its reverse (204215551), we get a palindrome (359727953).

The spelling of 155512402 in words is "one hundred fifty-five million, five hundred twelve thousand, four hundred two".