155151620 has 24 divisors (see below), whose sum is σ = 350881944. Its totient is φ = 57286656.

The previous prime is 155151593. The next prime is 155151631. The reversal of 155151620 is 26151551.

155151620 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 198916 + 154952704 = 446^2 + 12448^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 155151620.

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, 298109 + ... + 298628.

It is an arithmetic number, because the mean of its divisors is an integer number (14620081).

Almost surely, 2^155151620 is an apocalyptic number.

155151620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155151620 is an abundant number, since it is smaller than the sum of its proper divisors (195730324).

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

155151620 is a wasteful number, since it uses less digits than its factorization.

155151620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596759 (or 596757 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 155151620 is about 12455.9873153436. The cubic root of 155151620 is about 537.3436300134.

The spelling of 155151620 in words is "one hundred fifty-five million, one hundred fifty-one thousand, six hundred twenty".