155477401 has 4 divisors (see below), whose sum is σ = 162237312. Its totient is φ = 148717492.

The previous prime is 155477389. The next prime is 155477407. The reversal of 155477401 is 104774551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155477401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155477407) 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, 3379921 + ... + 3379966.

It is an arithmetic number, because the mean of its divisors is an integer number (40559328).

Almost surely, 2^155477401 is an apocalyptic number.

It is an amenable number.

155477401 is a deficient number, since it is larger than the sum of its proper divisors (6759911).

155477401 is an equidigital number, since it uses as much as digits as its factorization.

155477401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759910.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 155477401 is about 12469.0577430694. The cubic root of 155477401 is about 537.7194644444.

The spelling of 155477401 in words is "one hundred fifty-five million, four hundred seventy-seven thousand, four hundred one".