155220454 has 16 divisors (see below), whose sum is σ = 238966992. Its totient is φ = 75575808.

The previous prime is 155220433. The next prime is 155220463. The reversal of 155220454 is 454022551.

It is a super-2 number, since 2×155220454² = 48186778679932232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27802 + ... + 32914.

It is an arithmetic number, because the mean of its divisors is an integer number (14935437).

Almost surely, 2^155220454 is an apocalyptic number.

155220454 is a deficient number, since it is larger than the sum of its proper divisors (83746538).

155220454 is a wasteful number, since it uses less digits than its factorization.

155220454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 155220454 is about 12458.7500978228. The cubic root of 155220454 is about 537.4230835674.

The spelling of 155220454 in words is "one hundred fifty-five million, two hundred twenty thousand, four hundred fifty-four".