155213107 has 4 divisors (see below), whose sum is σ = 177386416. Its totient is φ = 133039800.

The previous prime is 155213083. The next prime is 155213119. The reversal of 155213107 is 701312551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155213107 - 2¹¹ = 155211059 is a prime.

It is a super-2 number, since 2×155213107² = 48182217169186898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155213197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11086644 + ... + 11086657.

It is an arithmetic number, because the mean of its divisors is an integer number (44346604).

Almost surely, 2^155213107 is an apocalyptic number.

155213107 is a deficient number, since it is larger than the sum of its proper divisors (22173309).

155213107 is an equidigital number, since it uses as much as digits as its factorization.

155213107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22173308.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 155213107 is about 12458.4552413211. The cubic root of 155213107 is about 537.4146042088.

Adding to 155213107 its reverse (701312551), we get a palindrome (856525658).

The spelling of 155213107 in words is "one hundred fifty-five million, two hundred thirteen thousand, one hundred seven".