49155901 has 4 divisors (see below), whose sum is σ = 49171804. Its totient is φ = 49140000.

The previous prime is 49155893. The next prime is 49155913. The reversal of 49155901 is 10955194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18619225 + 30536676 = 4315^2 + 5526^2 .

It is a cyclic number.

It is not a de Polignac number, because 49155901 - 2³ = 49155893 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 (49155961) 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, 1650 + ... + 10051.

It is an arithmetic number, because the mean of its divisors is an integer number (12292951).

Almost surely, 2^49155901 is an apocalyptic number.

It is an amenable number.

49155901 is a deficient number, since it is larger than the sum of its proper divisors (15903).

49155901 is a wasteful number, since it uses less digits than its factorization.

49155901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15902.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 49155901 is about 7011.1269422255. The cubic root of 49155901 is about 366.3182481816.

It can be divided in two parts, 4915 and 5901, that added together give a square (10816 = 104²).

The spelling of 49155901 in words is "forty-nine million, one hundred fifty-five thousand, nine hundred one".