155321402 has 8 divisors (see below), whose sum is σ = 233328276. Its totient is φ = 77545312.

The previous prime is 155321399. The next prime is 155321473. The reversal of 155321402 is 204123551.

It can be written as a sum of positive squares in 2 ways, for example, as 113188321 + 42133081 = 10639^2 + 6491^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56003 + ... + 58710.

Almost surely, 2^155321402 is an apocalyptic number.

155321402 is a deficient number, since it is larger than the sum of its proper divisors (78006874).

155321402 is a wasteful number, since it uses less digits than its factorization.

155321402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115392.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155321402 is about 12462.8007285682. The cubic root of 155321402 is about 537.5395631235.

Adding to 155321402 its reverse (204123551), we get a palindrome (359444953).

The spelling of 155321402 in words is "one hundred fifty-five million, three hundred twenty-one thousand, four hundred two".