155131214 has 16 divisors (see below), whose sum is σ = 266460288. Its totient is φ = 66354552.

The previous prime is 155131213. The next prime is 155131231. The reversal of 155131214 is 412131551.

It is a super-2 number, since 2×155131214² = 48131387114227592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155131214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155131213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3272 + ... + 17915.

It is an arithmetic number, because the mean of its divisors is an integer number (16653768).

Almost surely, 2^155131214 is an apocalyptic number.

155131214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

155131214 is a deficient number, since it is larger than the sum of its proper divisors (111329074).

155131214 is a wasteful number, since it uses less digits than its factorization.

155131214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21719.

The product of its digits is 600, while the sum is 23.

The square root of 155131214 is about 12455.1681642602. The cubic root of 155131214 is about 537.3200713060.

Adding to 155131214 its reverse (412131551), we get a palindrome (567262765).

The spelling of 155131214 in words is "one hundred fifty-five million, one hundred thirty-one thousand, two hundred fourteen".