155223430 has 32 divisors (see below), whose sum is σ = 297548640. Its totient is φ = 58099200.

The previous prime is 155223391. The next prime is 155223451. The reversal of 155223430 is 34322551.

It is a super-5 number, since 5×155223430⁵ (a number of 42 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155223395 and 155223404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27880 + ... + 32980.

It is an arithmetic number, because the mean of its divisors is an integer number (9298395).

Almost surely, 2^155223430 is an apocalyptic number.

155223430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155223430 is a deficient number, since it is larger than the sum of its proper divisors (142325210).

155223430 is a wasteful number, since it uses less digits than its factorization.

155223430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 155223430 is about 12458.8695313821. The cubic root of 155223430 is about 537.4265181682.

Adding to 155223430 its reverse (34322551), we get a palindrome (189545981).

The spelling of 155223430 in words is "one hundred fifty-five million, two hundred twenty-three thousand, four hundred thirty".