55087491 has 8 divisors (see below), whose sum is σ = 73766160. Its totient is φ = 36566912.

The previous prime is 55087471. The next prime is 55087519. The reversal of 55087491 is 19478055.

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

It is a cyclic number.

It is not a de Polignac number, because 55087491 - 2⁶ = 55087427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55087421) 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, 38706 + ... + 40103.

It is an arithmetic number, because the mean of its divisors is an integer number (9220770).

Almost surely, 2^55087491 is an apocalyptic number.

55087491 is a deficient number, since it is larger than the sum of its proper divisors (18678669).

55087491 is a wasteful number, since it uses less digits than its factorization.

55087491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79045.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 55087491 is about 7422.0947851668. The cubic root of 55087491 is about 380.4967902234.

The spelling of 55087491 in words is "fifty-five million, eighty-seven thousand, four hundred ninety-one".