45051391 has 16 divisors (see below), whose sum is σ = 56325888. Its totient is φ = 35006400.

The previous prime is 45051379. The next prime is 45051421. The reversal of 45051391 is 19315054.

45051391 = T₁₉₀ + T₁₉₁ + ... + T₆₅₁.

It is not a de Polignac number, because 45051391 - 2⁷ = 45051263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45051301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39556 + ... + 40678.

It is an arithmetic number, because the mean of its divisors is an integer number (3520368).

Almost surely, 2^45051391 is an apocalyptic number.

45051391 is a deficient number, since it is larger than the sum of its proper divisors (11274497).

45051391 is a wasteful number, since it uses less digits than its factorization.

45051391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 45051391 is about 6712.0332984871. The cubic root of 45051391 is about 355.8246806443.

The spelling of 45051391 in words is "forty-five million, fifty-one thousand, three hundred ninety-one".