155201900 has 36 divisors (see below), whose sum is σ = 384902448. Its totient is φ = 53211840.

The previous prime is 155201867. The next prime is 155201911. The reversal of 155201900 is 9102551.

It is a super-2 number, since 2×155201900² = 48175259527220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110159 + ... + 111558.

Almost surely, 2^155201900 is an apocalyptic number.

155201900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155201900 is an abundant number, since it is smaller than the sum of its proper divisors (229700548).

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

155201900 is a wasteful number, since it uses less digits than its factorization.

155201900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221738 (or 221731 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 155201900 is about 12458.0054583388. The cubic root of 155201900 is about 537.4016694110.

The spelling of 155201900 in words is "one hundred fifty-five million, two hundred one thousand, nine hundred".