155193340 has 24 divisors (see below), whose sum is σ = 345077712. Its totient is φ = 58425600.

The previous prime is 155193331. The next prime is 155193341. The reversal of 155193340 is 43391551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155193341) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 227886 + ... + 228565.

It is an arithmetic number, because the mean of its divisors is an integer number (14378238).

Almost surely, 2^155193340 is an apocalyptic number.

155193340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155193340 is an abundant number, since it is smaller than the sum of its proper divisors (189884372).

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

155193340 is a wasteful number, since it uses less digits than its factorization.

155193340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456477 (or 456475 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 155193340 is about 12457.6618994095. The cubic root of 155193340 is about 537.3917892853.

The spelling of 155193340 in words is "one hundred fifty-five million, one hundred ninety-three thousand, three hundred forty".