155900434 has 16 divisors (see below), whose sum is σ = 246718080. Its totient is φ = 73679760.

The previous prime is 155900431. The next prime is 155900441. The reversal of 155900434 is 434009551.

It is a junction number, because it is equal to n+sod(n) for n = 155900396 and 155900405.

It is not an unprimeable number, because it can be changed into a prime (155900431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13164 + ... + 22024.

It is an arithmetic number, because the mean of its divisors is an integer number (15419880).

Almost surely, 2^155900434 is an apocalyptic number.

155900434 is a deficient number, since it is larger than the sum of its proper divisors (90817646).

155900434 is a wasteful number, since it uses less digits than its factorization.

155900434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9345.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 155900434 is about 12486.0095306707. The cubic root of 155900434 is about 538.2067101367.

Adding to 155900434 its reverse (434009551), we get a palindrome (589909985).

The spelling of 155900434 in words is "one hundred fifty-five million, nine hundred thousand, four hundred thirty-four".