55157190 has 96 divisors (see below), whose sum is σ = 152741376. Its totient is φ = 12640320.

The previous prime is 55157189. The next prime is 55157191. The reversal of 55157190 is 9175155.

It is an interprime number because it is at equal distance from previous prime (55157189) and next prime (55157191).

It is a super-2 number, since 2×55157190² = 6084631217392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55157191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118899 + ... + 119361.

It is an arithmetic number, because the mean of its divisors is an integer number (1591056).

Almost surely, 2^55157190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55157190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76370688).

55157190 is an abundant number, since it is smaller than the sum of its proper divisors (97584186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55157190 is a wasteful number, since it uses less digits than its factorization.

55157190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 55157190 is about 7426.7886734443. The cubic root of 55157190 is about 380.6571960815.

The spelling of 55157190 in words is "fifty-five million, one hundred fifty-seven thousand, one hundred ninety".