140401551 has 8 divisors (see below), whose sum is σ = 187279024. Its totient is φ = 93562560.

The previous prime is 140401531. The next prime is 140401553. The reversal of 140401551 is 155104041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140401551 - 2⁷ = 140401423 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 (140401553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (23409878).

Almost surely, 2^140401551 is an apocalyptic number.

140401551 is a deficient number, since it is larger than the sum of its proper divisors (46877473).

140401551 is a wasteful number, since it uses less digits than its factorization.

140401551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19241.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 140401551 is about 11849.1160429797. The cubic root of 140401551 is about 519.7453770677.

Adding to 140401551 its reverse (155104041), we get a palindrome (295505592).

The spelling of 140401551 in words is "one hundred forty million, four hundred one thousand, five hundred fifty-one".