145550651 has 4 divisors (see below), whose sum is σ = 154112472. Its totient is φ = 136988832.

The previous prime is 145550597. The next prime is 145550707. The reversal of 145550651 is 156055541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156055541 = 107 ⋅1458463.

It is a cyclic number.

It is not a de Polignac number, because 145550651 - 2¹⁰ = 145549627 is a prime.

It is a super-3 number, since 3×145550651³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145550551) 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, 4280885 + ... + 4280918.

It is an arithmetic number, because the mean of its divisors is an integer number (38528118).

Almost surely, 2^145550651 is an apocalyptic number.

145550651 is a deficient number, since it is larger than the sum of its proper divisors (8561821).

145550651 is an equidigital number, since it uses as much as digits as its factorization.

145550651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8561820.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 145550651 is about 12064.4374506232. The cubic root of 145550651 is about 526.0229801485.

The spelling of 145550651 in words is "one hundred forty-five million, five hundred fifty thousand, six hundred fifty-one".