155197806 has 16 divisors (see below), whose sum is σ = 310538448. Its totient is φ = 51708800.

The previous prime is 155197787. The next prime is 155197817. The reversal of 155197806 is 608791551.

It is a congruent number.

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, 12646 + ... + 21686.

It is an arithmetic number, because the mean of its divisors is an integer number (19408653).

Almost surely, 2^155197806 is an apocalyptic number.

155197806 is an abundant number, since it is smaller than the sum of its proper divisors (155340642).

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

155197806 is a wasteful number, since it uses less digits than its factorization.

155197806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 155197806 is about 12457.8411452386. The cubic root of 155197806 is about 537.3969440785.

The spelling of 155197806 in words is "one hundred fifty-five million, one hundred ninety-seven thousand, eight hundred six".