45212155 has 8 divisors (see below), whose sum is σ = 54365472. Its totient is φ = 36095808.

The previous prime is 45212147. The next prime is 45212177. The reversal of 45212155 is 55121254.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45212155 - 2³ = 45212147 is a prime.

It is a Duffinian 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, 6474 + ... + 11503.

It is an arithmetic number, because the mean of its divisors is an integer number (6795684).

Almost surely, 2^45212155 is an apocalyptic number.

45212155 is a deficient number, since it is larger than the sum of its proper divisors (9153317).

45212155 is a wasteful number, since it uses less digits than its factorization.

45212155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18485.

The product of its digits is 2000, while the sum is 25.

The square root of 45212155 is about 6723.9984384293. The cubic root of 45212155 is about 356.2474266768.

Subtracting 45212155 from its reverse (55121254), we obtain a palindrome (9909099).

The spelling of 45212155 in words is "forty-five million, two hundred twelve thousand, one hundred fifty-five".