155420430 has 64 divisors (see below), whose sum is σ = 424631808. Its totient is φ = 36037760.

The previous prime is 155420383. The next prime is 155420459. The reversal of 155420430 is 34024551.

It is a super-2 number, since 2×155420430² = 48311020122769800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155420430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2649 + ... + 17828.

It is an arithmetic number, because the mean of its divisors is an integer number (6634872).

Almost surely, 2^155420430 is an apocalyptic number.

155420430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155420430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212315904).

155420430 is an abundant number, since it is smaller than the sum of its proper divisors (269211378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155420430 is a wasteful number, since it uses less digits than its factorization.

155420430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20521.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155420430 is about 12466.7730387619. The cubic root of 155420430 is about 537.6537782463.

Adding to 155420430 its reverse (34024551), we get a palindrome (189444981).

The spelling of 155420430 in words is "one hundred fifty-five million, four hundred twenty thousand, four hundred thirty".