45145551 has 32 divisors (see below), whose sum is σ = 68495616. Its totient is φ = 26208000.

The previous prime is 45145549. The next prime is 45145553. The reversal of 45145551 is 15554154.

45145551 = T₁₁₈₆ + T₁₁₈₇ + ... + T₁₂₄₆.

It is an interprime number because it is at equal distance from previous prime (45145549) and next prime (45145553).

It is not a de Polignac number, because 45145551 - 2¹ = 45145549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45145553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82260 + ... + 82806.

It is an arithmetic number, because the mean of its divisors is an integer number (2140488).

Almost surely, 2^45145551 is an apocalyptic number.

45145551 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

45145551 is a deficient number, since it is larger than the sum of its proper divisors (23350065).

45145551 is a wasteful number, since it uses less digits than its factorization.

45145551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663.

The product of its digits is 10000, while the sum is 30.

The square root of 45145551 is about 6719.0439051996. The cubic root of 45145551 is about 356.0724061579.

The spelling of 45145551 in words is "forty-five million, one hundred forty-five thousand, five hundred fifty-one".