145400551 has 2 divisors, whose sum is σ = 145400552. Its totient is φ = 145400550.

The previous prime is 145400543. The next prime is 145400579. The reversal of 145400551 is 155004541.

It is a happy number.

145400551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145400551 - 2³ = 145400543 is a prime.

It is a super-2 number, since 2×145400551² = 42282640462207202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145400581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72700275 + 72700276.

It is an arithmetic number, because the mean of its divisors is an integer number (72700276).

Almost surely, 2^145400551 is an apocalyptic number.

145400551 is a deficient number, since it is larger than the sum of its proper divisors (1).

145400551 is an equidigital number, since it uses as much as digits as its factorization.

145400551 is an evil number, because the sum of its binary digits is even.

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

The square root of 145400551 is about 12058.2150835022. The cubic root of 145400551 is about 525.8420964821.

The spelling of 145400551 in words is "one hundred forty-five million, four hundred thousand, five hundred fifty-one".