401551545 has 16 divisors (see below), whose sum is σ = 664637760. Its totient is φ = 206775744.

The previous prime is 401551541. The next prime is 401551547. The reversal of 401551545 is 545155104.

It is not a de Polignac number, because 401551545 - 2² = 401551541 is a prime.

It is a super-2 number, since 2×401551545² = 322487286583774050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401551541) 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, 461119 + ... + 461988.

It is an arithmetic number, because the mean of its divisors is an integer number (41539860).

Almost surely, 2^401551545 is an apocalyptic number.

It is an amenable number.

401551545 is a deficient number, since it is larger than the sum of its proper divisors (263086215).

401551545 is a wasteful number, since it uses less digits than its factorization.

401551545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923144.

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

The square root of 401551545 is about 20038.7510838375. The cubic root of 401551545 is about 737.7577274093.

The spelling of 401551545 in words is "four hundred one million, five hundred fifty-one thousand, five hundred forty-five".