155700140 has 24 divisors (see below), whose sum is σ = 327408480. Its totient is φ = 62196608.

The previous prime is 155700113. The next prime is 155700191. The reversal of 155700140 is 41007551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11369 + ... + 20991.

It is an arithmetic number, because the mean of its divisors is an integer number (13642020).

Almost surely, 2^155700140 is an apocalyptic number.

155700140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155700140 is an abundant number, since it is smaller than the sum of its proper divisors (171708340).

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

155700140 is a wasteful number, since it uses less digits than its factorization.

155700140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10441 (or 10439 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 155700140 is about 12477.9862157321. The cubic root of 155700140 is about 537.9761232799.

Adding to 155700140 its reverse (41007551), we get a palindrome (196707691).

The spelling of 155700140 in words is "one hundred fifty-five million, seven hundred thousand, one hundred forty".