155220460 has 12 divisors (see below), whose sum is σ = 325963008. Its totient is φ = 62088176.

The previous prime is 155220433. The next prime is 155220463. The reversal of 155220460 is 64022551.

It is a super-2 number, since 2×155220460² = 48186782405223200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155220463) 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, 3880492 + ... + 3880531.

It is an arithmetic number, because the mean of its divisors is an integer number (27163584).

Almost surely, 2^155220460 is an apocalyptic number.

155220460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155220460 is an abundant number, since it is smaller than the sum of its proper divisors (170742548).

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

155220460 is a wasteful number, since it uses less digits than its factorization.

155220460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7761032 (or 7761030 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 155220460 is about 12458.7503386174. The cubic root of 155220460 is about 537.4230904920.

The spelling of 155220460 in words is "one hundred fifty-five million, two hundred twenty thousand, four hundred sixty".