155102040 has 160 divisors (see below), whose sum is σ = 526117680. Its totient is φ = 41150592.

The previous prime is 155102023. The next prime is 155102047. The reversal of 155102040 is 40201551.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155102047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 787222 + ... + 787418.

Almost surely, 2^155102040 is an apocalyptic number.

155102040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155102040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263058840).

155102040 is an abundant number, since it is smaller than the sum of its proper divisors (371015640).

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

155102040 is an frugal number, since it uses more digits than its factorization.

155102040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 155102040 is about 12453.9969487711. The cubic root of 155102040 is about 537.2863863625.

Adding to 155102040 its reverse (40201551), we get a palindrome (195303591).

The spelling of 155102040 in words is "one hundred fifty-five million, one hundred two thousand, forty".