155551004 has 24 divisors (see below), whose sum is σ = 312119808. Its totient is φ = 66446640.

The previous prime is 155550991. The next prime is 155551021. The reversal of 155551004 is 400155551.

It is a super-2 number, since 2×155551004² = 48392229690816032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224 + ... + 17639.

It is an arithmetic number, because the mean of its divisors is an integer number (13004992).

Almost surely, 2^155551004 is an apocalyptic number.

155551004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155551004 is an abundant number, since it is smaller than the sum of its proper divisors (156568804).

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

155551004 is a wasteful number, since it uses less digits than its factorization.

155551004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18185 (or 18183 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 155551004 is about 12472.0088197531. The cubic root of 155551004 is about 537.8043031879.

The spelling of 155551004 in words is "one hundred fifty-five million, five hundred fifty-one thousand, four".