155617240 has 16 divisors (see below), whose sum is σ = 350138880. Its totient is φ = 62246880.

The previous prime is 155617237. The next prime is 155617243. The reversal of 155617240 is 42716551.

It is an interprime number because it is at equal distance from previous prime (155617237) and next prime (155617243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155617243) 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 3 ways as a sum of consecutive naturals, for example, 1945176 + ... + 1945255.

It is an arithmetic number, because the mean of its divisors is an integer number (21883680).

Almost surely, 2^155617240 is an apocalyptic number.

155617240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155617240 is an abundant number, since it is smaller than the sum of its proper divisors (194521640).

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

155617240 is a wasteful number, since it uses less digits than its factorization.

155617240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890442 (or 3890438 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 155617240 is about 12474.6639233288. The cubic root of 155617240 is about 537.8806274588.

It can be divided in two parts, 15561 and 7240, that added together give a square (22801 = 151²).

The spelling of 155617240 in words is "one hundred fifty-five million, six hundred seventeen thousand, two hundred forty".